22539625 has 8 divisors (see below), whose sum is σ = 28129608. Its totient is φ = 18031600.

The previous prime is 22539613. The next prime is 22539631. The reversal of 22539625 is 52693522.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5125696 + 17413929 = 2264^2 + 4173^2 .

It is not a de Polignac number, because 22539625 - 2⁷ = 22539497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90034 + ... + 90283.

It is an arithmetic number, because the mean of its divisors is an integer number (3516201).

Almost surely, 2^22539625 is an apocalyptic number.

22539625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22539625 is a deficient number, since it is larger than the sum of its proper divisors (5589983).

22539625 is an equidigital number, since it uses as much as digits as its factorization.

22539625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180332 (or 180322 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 22539625 is about 4747.5914946423. The cubic root of 22539625 is about 282.4764383722.

The spelling of 22539625 in words is "twenty-two million, five hundred thirty-nine thousand, six hundred twenty-five".