22255212 has 48 divisors (see below), whose sum is σ = 60569600. Its totient is φ = 6357456.

The previous prime is 22255199. The next prime is 22255229. The reversal of 22255212 is 21255222.

It is a super-2 number, since 2×22255212² = 990588922329888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413 + ... + 6819.

Almost surely, 2^22255212 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 22255212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30284800).

22255212 is an abundant number, since it is smaller than the sum of its proper divisors (38314388).

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

22255212 is a wasteful number, since it uses less digits than its factorization.

22255212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435 (or 5419 counting only the distinct ones).

The product of its digits is 800, while the sum is 21.

The square root of 22255212 is about 4717.5430045735. The cubic root of 22255212 is about 281.2832762603.

The spelling of 22255212 in words is "twenty-two million, two hundred fifty-five thousand, two hundred twelve".