222 (number)

This article is about the number. For the year 222, see 222. For the pain medication known as 222, see Co-codaprin.

List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	Two hundred [and] twenty-two
Ordinal	222nd
Factorization	$222 = 2 \cdot 3 \cdot 37$
Roman numeral	CCXXII
Binary	11011110
Hexadecimal	DE

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 ratio of the areas B / A equals 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.

Other meanings

Two hundred and twenty-two is also:

• Dewey Decimal System 222 is Historical Books of the Old Testament.
• 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 an American football game.
• SdKfz 222, a WWII German reconnaissance vehicle.
• In the animated TV show 12 oz. Mouse, time is stuck at 2:22.
• 222 is an over the counter drug that contains ASA and codeine, see co-codaprin.
• The 222s is a Montreal punk band which took its name from the aforementionned drug
• 222 is the title of a comedy album by Patton Oswalt. It is the full version of the same show recorded on his previous album, Feelin' Kinda Patton.
• "222" is a song by Paul McCartney on the 2-CD edition of his 2007 studio album Memory Almost Full.
• The return of WWE wrestler Chris Jericho was slowly hyped by a series of mysterious promos featuring the cryptic code "SAVE_US.222".
• A 222 or Two Two Two is a standard British Railway Key.
• In the Jerry Lewis movie The Nutty Professor, the main character tells the school's dean that he's been employed with the school for "two years and 22 minutes." This occurs at the film's beginning, after the professor blows up his own classroom.
• A-222 Bereg, a Russian self-propelled 130 mm coastal defence gun