22557131 has 2 divisors, whose sum is σ = 22557132. Its totient is φ = 22557130.

The previous prime is 22557121. The next prime is 22557149. The reversal of 22557131 is 13175522.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22557131 is a prime.

It is a super-2 number, since 2×22557131² = 1017648317902322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22557131.

It is not a weakly prime, because it can be changed into another prime (22557121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11278565 + 11278566.

It is an arithmetic number, because the mean of its divisors is an integer number (11278566).

Almost surely, 2^22557131 is an apocalyptic number.

22557131 is a deficient number, since it is larger than the sum of its proper divisors (1).

22557131 is an equidigital number, since it uses as much as digits as its factorization.

22557131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 26.

The square root of 22557131 is about 4749.4348084798. The cubic root of 22557131 is about 282.5495503968.

The spelling of 22557131 in words is "twenty-two million, five hundred fifty-seven thousand, one hundred thirty-one".