22557321 has 12 divisors (see below), whose sum is σ = 33276672. Its totient is φ = 14717976.

The previous prime is 22557307. The next prime is 22557323. The reversal of 22557321 is 12375522.

It is not a de Polignac number, because 22557321 - 2⁷ = 22557193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22557323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26241 + ... + 27086.

It is an arithmetic number, because the mean of its divisors is an integer number (2773056).

Almost surely, 2^22557321 is an apocalyptic number.

It is an amenable number.

22557321 is a deficient number, since it is larger than the sum of its proper divisors (10719351).

22557321 is a wasteful number, since it uses less digits than its factorization.

22557321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53380 (or 53377 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 22557321 is about 4749.4548108178. The cubic root of 22557321 is about 282.5503437049.

The spelling of 22557321 in words is "twenty-two million, five hundred fifty-seven thousand, three hundred twenty-one".