22557564 has 18 divisors (see below), whose sum is σ = 57020600. Its totient is φ = 7519176.

The previous prime is 22557559. The next prime is 22557569. The reversal of 22557564 is 46575522.

22557564 is a `hidden beast` number, since 2 + 25 + 575 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (22557559) and next prime (22557569).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×22557564² = 1017687387228192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 626599 = 22557564 / (2 + 2 + 5 + 5 + 7 + 5 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22557569) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 313264 + ... + 313335.

Almost surely, 2^22557564 is an apocalyptic number.

It is an amenable number.

22557564 is an abundant number, since it is smaller than the sum of its proper divisors (34463036).

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

22557564 is a wasteful number, since it uses less digits than its factorization.

22557564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626609 (or 626604 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 22557564 is about 4749.4803926324. The cubic root of 22557564 is about 282.5513582977.

The spelling of 22557564 in words is "twenty-two million, five hundred fifty-seven thousand, five hundred sixty-four".