22537531 has 2 divisors, whose sum is σ = 22537532. Its totient is φ = 22537530.

The previous prime is 22537523. The next prime is 22537573. The reversal of 22537531 is 13573522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22537531 - 2³ = 22537523 is a prime.

It is a super-2 number, since 2×22537531² = 1015880607151922, 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 22537531.

It is not a weakly prime, because it can be changed into another prime (22537231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11268765 + 11268766.

It is an arithmetic number, because the mean of its divisors is an integer number (11268766).

Almost surely, 2^22537531 is an apocalyptic number.

22537531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22537531 is an equidigital number, since it uses as much as digits as its factorization.

22537531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 28.

The square root of 22537531 is about 4747.3709566454. The cubic root of 22537531 is about 282.4676904600.

The spelling of 22537531 in words is "twenty-two million, five hundred thirty-seven thousand, five hundred thirty-one".