22539631 has 2 divisors, whose sum is σ = 22539632. Its totient is φ = 22539630.

The previous prime is 22539613. The next prime is 22539661. The reversal of 22539631 is 13693522.

Together with previous prime (22539613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22539631 - 2²¹ = 20442479 is a prime.

It is a super-2 number, since 2×22539631² = 1016069931232322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22539593 and 22539602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22539661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11269815 + 11269816.

It is an arithmetic number, because the mean of its divisors is an integer number (11269816).

Almost surely, 2^22539631 is an apocalyptic number.

22539631 is a deficient number, since it is larger than the sum of its proper divisors (1).

22539631 is an equidigital number, since it uses as much as digits as its factorization.

22539631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 22539631 is about 4747.5921265416. The cubic root of 22539631 is about 282.4764634371.

The spelling of 22539631 in words is "twenty-two million, five hundred thirty-nine thousand, six hundred thirty-one".