22566631 has 2 divisors, whose sum is σ = 22566632. Its totient is φ = 22566630.

The previous prime is 22566617. The next prime is 22566637. The reversal of 22566631 is 13666522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22566631 is a prime.

It is a super-2 number, since 2×22566631² = 1018505669380322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22566593 and 22566602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22566637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11283315 + 11283316.

It is an arithmetic number, because the mean of its divisors is an integer number (11283316).

Almost surely, 2^22566631 is an apocalyptic number.

22566631 is a deficient number, since it is larger than the sum of its proper divisors (1).

22566631 is an equidigital number, since it uses as much as digits as its factorization.

22566631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 22566631 is about 4750.4348222031. The cubic root of 22566631 is about 282.5892103458.

The spelling of 22566631 in words is "twenty-two million, five hundred sixty-six thousand, six hundred thirty-one".