25541631 has 24 divisors (see below), whose sum is σ = 37964160. Its totient is φ = 16541136.

The previous prime is 25541627. The next prime is 25541639. The reversal of 25541631 is 13614552.

25541631 is a `hidden beast` number, since 25 + 5 + 4 + 1 + 631 = 666.

It is not a de Polignac number, because 25541631 - 2² = 25541627 is a prime.

It is a super-2 number, since 2×25541631² = 1304749828280322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25541595 and 25541604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25541639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54460 + ... + 54926.

It is an arithmetic number, because the mean of its divisors is an integer number (1581840).

Almost surely, 2^25541631 is an apocalyptic number.

25541631 is a deficient number, since it is larger than the sum of its proper divisors (12422529).

25541631 is a wasteful number, since it uses less digits than its factorization.

25541631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 632 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 25541631 is about 5053.8728713730. The cubic root of 25541631 is about 294.4983564851.

The spelling of 25541631 in words is "twenty-five million, five hundred forty-one thousand, six hundred thirty-one".