22553568 has 36 divisors (see below), whose sum is σ = 64137528. Its totient is φ = 7517760.

The previous prime is 22553563. The next prime is 22553621. The reversal of 22553568 is 86535522.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22553563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38868 + ... + 39443.

It is an arithmetic number, because the mean of its divisors is an integer number (1781598).

Almost surely, 2^22553568 is an apocalyptic number.

It is an amenable number.

22553568 is an abundant number, since it is smaller than the sum of its proper divisors (41583960).

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

22553568 is a wasteful number, since it uses less digits than its factorization.

22553568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78327 (or 78316 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 22553568 is about 4749.0596964031. The cubic root of 22553568 is about 282.5346729572.

The spelling of 22553568 in words is "twenty-two million, five hundred fifty-three thousand, five hundred sixty-eight".