22713531 has 16 divisors (see below), whose sum is σ = 32269440. Its totient is φ = 14169600.

The previous prime is 22713499. The next prime is 22713541. The reversal of 22713531 is 13531722.

It is not a de Polignac number, because 22713531 - 2⁵ = 22713499 is a prime.

It is a super-2 number, since 2×22713531² = 1031808980975922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22713541) 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, 2331 + ... + 7131.

It is an arithmetic number, because the mean of its divisors is an integer number (2016840).

Almost surely, 2^22713531 is an apocalyptic number.

22713531 is a deficient number, since it is larger than the sum of its proper divisors (9555909).

22713531 is a wasteful number, since it uses less digits than its factorization.

22713531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906.

The product of its digits is 1260, while the sum is 24.

The square root of 22713531 is about 4765.8714837897. The cubic root of 22713531 is about 283.2010665996.

The spelling of 22713531 in words is "twenty-two million, seven hundred thirteen thousand, five hundred thirty-one".