222 (number)

← 221 222 223 →
← 200 210 220 230 240 250 260 270 280 290 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred twenty-two
Ordinal	222nd (two hundred and twenty-second)
Factorization	2 × 3 × 37
Roman numeral	CCXXII
Binary	110111102
Ternary	220203
Quaternary	31324
Quinary	13425
Senary	10106
Octal	3368
Duodecimal	16612
Hexadecimal	DE16
Vigesimal	B220
Base 36	6636

222 (two hundred [and] twenty-two) is the natural number following 221 and preceding 223.

It is a decimal repdigit and a strobogrammatic number (meaning that it looks the same turned upside down on a calculator display). It is one of the numbers whose digit sum in decimal is the same as it is in binary.

222 is a noncototient, meaning that it cannot be written in the form n − φ(n) where φ is Euler's totient function counting the number of values that are smaller than n and relatively prime to it.

There are exactly 222 distinct ways of assigning a meet and join operation to a set of ten unlabeled elements in order to give them the structure of a lattice, and exactly 222 different six-edge polysticks.

See also

• The years CE 222 or 222 BCE.
• Room 222 (TV show)
• Bell 222 (helicopter)
• SdKfz 222, a WWII German reconnaissance vehicle
• The 222s, a Montreal punk band which took its name from a code name for co-codaprin
• 222, a comedy album by Patton Oswalt
• "222", a song by Paul McCartney on the 2-CD edition of his 2007 studio album Memory Almost Full.
• A-222 Bereg, a Russian self-propelled 130 mm coastal defence gun