22504521 has 16 divisors (see below), whose sum is σ = 32417280. Its totient is φ = 13804800.

The previous prime is 22504483. The next prime is 22504529. The reversal of 22504521 is 12540522.

It is a happy number.

It is not a de Polignac number, because 22504521 - 2⁷ = 22504393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22504529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14920 + ... + 16358.

It is an arithmetic number, because the mean of its divisors is an integer number (2026080).

Almost surely, 2^22504521 is an apocalyptic number.

It is an amenable number.

22504521 is a deficient number, since it is larger than the sum of its proper divisors (9912759).

22504521 is a wasteful number, since it uses less digits than its factorization.

22504521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 22504521 is about 4743.8930215594. The cubic root of 22504521 is about 282.3297159486.

The spelling of 22504521 in words is "twenty-two million, five hundred four thousand, five hundred twenty-one".