222256 has 20 divisors (see below), whose sum is σ = 446400. Its totient is φ = 107072.

The previous prime is 222247. The next prime is 222269. The reversal of 222256 is 652222.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225 + ... + 703.

It is an arithmetic number, because the mean of its divisors is an integer number (22320).

2²²²²⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223200).

222256 is an abundant number, since it is smaller than the sum of its proper divisors (224144).

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

222256 is a wasteful number, since it uses less digits than its factorization.

222256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 510 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 222256 is about 471.4403461733. The cubic root of 222256 is about 60.5737551870.

Adding to 222256 its reverse (652222), we get a palindrome (874478).

It can be divided in two parts, 2222 and 56, that added together give a triangular number (2278 = T₆₇).

The spelling of 222256 in words is "two hundred twenty-two thousand, two hundred fifty-six".