22501008 has 30 divisors (see below), whose sum is σ = 62971974. Its totient is φ = 7500288.

The previous prime is 22500967. The next prime is 22501019. The reversal of 22501008 is 80010522.

It can be written as a sum of positive squares in only one way, i.e., 13927824 + 8573184 = 3732^2 + 2928^2 .

It is a super-2 number, since 2×22501008² = 1012590722032128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77985 + ... + 78272.

Almost surely, 2^22501008 is an apocalyptic number.

It is an amenable number.

22501008 is an abundant number, since it is smaller than the sum of its proper divisors (40470966).

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

22501008 is a wasteful number, since it uses less digits than its factorization.

22501008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156271 (or 156262 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 22501008 is about 4743.5227415919. The cubic root of 22501008 is about 282.3150244428.

The spelling of 22501008 in words is "twenty-two million, five hundred one thousand, eight".