22915531 has 2 divisors, whose sum is σ = 22915532. Its totient is φ = 22915530.

The previous prime is 22915523. The next prime is 22915549. The reversal of 22915531 is 13551922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22915531 - 2³ = 22915523 is a prime.

It is a super-2 number, since 2×22915531² = 1050243122023922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22915531.

It is not a weakly prime, because it can be changed into another prime (22915511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11457765 + 11457766.

It is an arithmetic number, because the mean of its divisors is an integer number (11457766).

Almost surely, 2^22915531 is an apocalyptic number.

22915531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22915531 is an equidigital number, since it uses as much as digits as its factorization.

22915531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 22915531 is about 4787.0169207973. The cubic root of 22915531 is about 284.0381280225.

The spelling of 22915531 in words is "twenty-two million, nine hundred fifteen thousand, five hundred thirty-one".