222 (number)

← 221 222 223 →
← 220 221 222 223 224 225 226 227 228 229 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred twenty-two
Ordinal	222nd (two hundred twenty-second)
Factorization	2 × 3 × 37
Greek numeral	ΣΚΒ´
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.

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