22502500 has 30 divisors (see below), whose sum is σ = 49213934. Its totient is φ = 9000000.

The previous prime is 22502489. The next prime is 22502531. The reversal of 22502500 is 520522.

It can be written as a sum of positive squares in 5 ways, for example, as 12730624 + 9771876 = 3568^2 + 3126^2 .

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 9 ways as a sum of consecutive naturals, for example, 2001 + ... + 7000.

Almost surely, 2^22502500 is an apocalyptic number.

22502500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22502500 is an abundant number, since it is smaller than the sum of its proper divisors (26711434).

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

22502500 is an equidigital number, since it uses as much as digits as its factorization.

22502500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9025 (or 9008 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 22502500 is about 4743.6800060712. The cubic root of 22502500 is about 282.3212642330.

The spelling of 22502500 in words is "twenty-two million, five hundred two thousand, five hundred".