222 (number)

222 (two hundred [and] twenty-two) is the natural number following 221 and preceding 223. It is a repdigit composite number, and its factorization makes it a sphenic number. It is also a Harshad number.

There is no solution to the equation x - φ(x) = 222, making 222 a noncototient. Nor is there, in base 10, an integer that added to the sum of its own digits yields 222, making 222 a self number.

Radii at 0° and approximately 222.49° divide a circle in the golden ratio.

The first triple repdigit in the square root of 222 is 222:

√222 =

14.89966442575133971933181604612395114023452166218124

    73380574030119289350747022456370098357196526519656

    52139396484012226637696242316850851449289924... 395612895/26551799

A prime reciprocal magic square based on 223 in base three has a magic constant of 222.

Given 10 unlabelled nodes, 222 lattices can be created.

Two hundred and twenty-two is also:

• Room 222 (TV show)
• Bell 222 (helicopter)
• The year, see CE 222 or 222 BCE.
• The score in the 1916 Cumberland vs. Georgia Tech football game, with Georgia Tech winning 222-0, was the record for most points scored by one team in a college (American) football game.
• SdKfz 222, a WWII German reconnaissance vehicle.
• In the Animated TV show "12 oz. Mouse" Time is stuck at 2:22.

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Last updated on Saturday July 12, 2008 at 06:02:51 PDT (GMT -0700)
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