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BaseRepresentation
bin11011110
322020
43132
51342
61010
7435
oct336
9266
10222
11192
12166
13141
1411c
15ec
hexde

222 has 8 divisors (see below), whose sum is σ = 456. Its totient is φ = 72.

The previous prime is 211. The next prime is 223.

It can be divided in two parts, 22 and 2, that multiplied together give a palindrome (44).

222 is nontrivially palindromic in base 10 and base 13.

222 is an esthetic number in base 6 and base 16, because in such bases its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (6), and also a Moran number because the ratio is a prime number: 37 = 222 / (2 + 2 + 2).

It is a nude number because it is divisible by every one of its digits.

222 is an undulating number in base 6 and base 13.

222 is a modest number, since divided by 22 gives 2 as remainder.

222 is a nontrivial repdigit in base 10.

It is a plaindrome in base 8, base 9, base 10, base 12, base 14 and base 16.

It is a nialpdrome in base 10 and base 15.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13 + ... + 24.

It is an arithmetic number, because the mean of its divisors is an integer number (57).

2222 is an apocalyptic number.

222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228).

222 is a wasteful number, since it uses less digits than its factorization.

222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42.

The product of its digits is 8, while the sum is 6.

The square root of 222 is about 14.8996644258. The cubic root of 222 is about 6.0550489465.

The spelling of 222 in words is "two hundred twenty-two", and thus it is an aban number and an iban number.

Divisors: 1 2 3 6 37 74 111 222