22641556 has 12 divisors (see below), whose sum is σ = 45283168. Its totient is φ = 9703512.

The previous prime is 22641551. The next prime is 22641581. The reversal of 22641556 is 65514622.

22641556 is an admirable number.

It is a super-2 number, since 2×22641556² = 1025280116202272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22641551) 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, 404286 + ... + 404341.

Almost surely, 2^22641556 is an apocalyptic number.

It is an amenable number.

22641556 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.

22641556 is a wasteful number, since it uses less digits than its factorization.

22641556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808638 (or 808636 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 22641556 is about 4758.3144074346. The cubic root of 22641556 is about 282.9016127166.

The spelling of 22641556 in words is "twenty-two million, six hundred forty-one thousand, five hundred fifty-six".