56 (number)

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56 (fifty-six) is the natural number following 55 and preceding 57.

Cardinal	56 fifty-six
Ordinal	56th fifty-sixth
Factorization	$2^3cdot\; 7$
Divisors	1, 2, 4, 7, 8, 14, 28, 56
Roman numeral	LVI
Binary	111000
Hexadecimal	38

In mathematics

56 is the sum of the first six triangular numbers (making it a tetrahedral number), as well as the sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17). It is also a tetranacci number and a pronic number. Adding up the divisors of 1 through 8 gives 56. Since 56 is twice a perfect number, it is itself a semiperfect number.

Since it is possible to find sequences of 56 consecutive integers such that each inner member member shares a factor with either the first or the last member, 56 is an Erdős–Woods number.

The maximum determinant in an 8 by 8 matrix of zeroes and ones is 56.

In science

• The atomic number of barium

Astronomy

• Messier object M56, a magnitude 9.5 globular cluster in the constellation Lyra
• The New General Catalogue object NGC 56, an unverified object in the constellation Pisces. NGC 76 does not appear to be a real object.
• The Saros number of the solar eclipse series which began on -1172 July 17 and ended on 144 September 15. The duration of Saros series 56 was 1316.2 years, and it contained 74 solar eclipses.
• The Saros number of the lunar eclipse series which began on -852 May 7 and ended on 428 June 13. The duration of Saros series 56 was 1280.1 years, and it contained 72 lunar eclipses.

In music

• Number of times the word "Yeah" is used by Michael Stipe (R.E.M.) in the song Man on the Moon
• The number of times the word "Yeah" is used in the song lithium by Nirvana
• Christian punk rock band Flatfoot 56
• "Along For The Ride ('56 T-bird)" sung by John Denver
• "Five Feet of Lovin '56" sung by Gene Vincent
• Elvis Presley CD "Elvis '56"
• The name of a Plexi song

In sports

In baseball, the number of consecutive games in which New York Yankees Joe DiMaggio had a base hit in 1941, still a record

Hack Wilson hit 56 home runs in 1930, a National League record until the time of Mark McGwire.

The number 56 was most famously worn by New York Giants linebacker Lawrence Taylor.

In other fields

Fifty-six is:

• The number of San Diego Chargers linbacker Shawne Merriman
• The number of men who signed the United States Declaration of Independence in 1776
• The code for international direct dial phone calls to Chile
• The maximum speed of analog data transmission over a POTS in the 20th century was 56 kbit/s
• The name of the town Fifty-Six, Arkansas
• The number of men of Netophah at the census of men of Israel upon return from exile (Ezra 2:22)
• The symbol of the 1956 Hungarian Revolution
• In baseball, the number of consecutive games in which Joe DiMaggio had a base hit in 1941, still a record
• The car number of Ray Peyton, Jr. (Breckin Meyer) in Herbie: Fully Loaded
• Famous Brazilian politician, Enéas Carneiro has an odd way of repeating the number of his party, "Fifty-Six" (cinqüenta e seis, in Portuguese), making it a widely repeated jargon in his country
• Department 56 designer of collectibles, giftware and seasonal decorations such as miniature village houses
• "Nasser 56" documentary
• Saddam Hussein was executed 56 days after conviction in 2006
• Shirley Temple, as a child, wore 56 curls in her hair. Curls were set by her mother who thus made sure of the exact number
• Mao Zedong was 56 when the People's Republic of China was established on Oct. 1, 1949
• Cape Horn, the Southernmost tip of South America, is located at almost exactly 56 degrees South
• In the Los Angeles postal district, Zone 56 (now the ZIP Code area 90056) is one of few that is not within the Los Angeles City Limits. (90020 and 90044 are others.)

Historical years

56 A.D., 56 B.C., 1956, 2056, etc.

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Last updated on Friday February 15, 2008 at 11:28:34 PST (GMT -0800)
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