22664531 has 2 divisors, whose sum is σ = 22664532. Its totient is φ = 22664530.

The previous prime is 22664527. The next prime is 22664533. The reversal of 22664531 is 13546622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22664531 - 2² = 22664527 is a prime.

It is a super-2 number, since 2×22664531² = 1027361930899922, which contains 22 as substring.

Together with 22664533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22664494 and 22664503.

It is not a weakly prime, because it can be changed into another prime (22664533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11332265 + 11332266.

It is an arithmetic number, because the mean of its divisors is an integer number (11332266).

Almost surely, 2^22664531 is an apocalyptic number.

22664531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22664531 is an equidigital number, since it uses as much as digits as its factorization.

22664531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 22664531 is about 4760.7279905493. The cubic root of 22664531 is about 282.9972696778.

It can be divided in two parts, 2266 and 4531, that multiplied together give a triangular number (10267246 = T₄₅₃₁).

The spelling of 22664531 in words is "twenty-two million, six hundred sixty-four thousand, five hundred thirty-one".