25325631 has 12 divisors (see below), whose sum is σ = 38733552. Its totient is φ = 15890496.

The previous prime is 25325627. The next prime is 25325639. The reversal of 25325631 is 13652352.

25325631 is a `hidden beast` number, since 2 + 5 + 3 + 25 + 631 = 666.

It is not a de Polignac number, because 25325631 - 2² = 25325627 is a prime.

It is a super-2 number, since 2×25325631² = 1282775171096322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25325595 and 25325604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25325639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82611 + ... + 82916.

It is an arithmetic number, because the mean of its divisors is an integer number (3227796).

Almost surely, 2^25325631 is an apocalyptic number.

25325631 is a deficient number, since it is larger than the sum of its proper divisors (13407921).

25325631 is a wasteful number, since it uses less digits than its factorization.

25325631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165550 (or 165547 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 25325631 is about 5032.4577494501. The cubic root of 25325631 is about 293.6658357943.

Adding to 25325631 its reverse (13652352), we get a palindrome (38977983).

The spelling of 25325631 in words is "twenty-five million, three hundred twenty-five thousand, six hundred thirty-one".