25632631 has 2 divisors, whose sum is σ = 25632632. Its totient is φ = 25632630.

The previous prime is 25632587. The next prime is 25632661. The reversal of 25632631 is 13623652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25632631 - 2²³ = 17244023 is a prime.

It is a super-2 number, since 2×25632631² = 1314063543964322, 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 25632631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25632661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12816315 + 12816316.

It is an arithmetic number, because the mean of its divisors is an integer number (12816316).

Almost surely, 2^25632631 is an apocalyptic number.

25632631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25632631 is an equidigital number, since it uses as much as digits as its factorization.

25632631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 25632631 is about 5062.8678631779. The cubic root of 25632631 is about 294.8476892571.

The spelling of 25632631 in words is "twenty-five million, six hundred thirty-two thousand, six hundred thirty-one".