25612131 has 16 divisors (see below), whose sum is σ = 34953120. Its totient is φ = 16677120.

The previous prime is 25612127. The next prime is 25612141. The reversal of 25612131 is 13121652.

It is not a de Polignac number, because 25612131 - 2² = 25612127 is a prime.

It is a super-2 number, since 2×25612131² = 1311962508722322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25612098 and 25612107.

It is not an unprimeable number, because it can be changed into a prime (25612141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31255 + ... + 32063.

It is an arithmetic number, because the mean of its divisors is an integer number (2184570).

Almost surely, 2^25612131 is an apocalyptic number.

25612131 is a deficient number, since it is larger than the sum of its proper divisors (9340989).

25612131 is a wasteful number, since it uses less digits than its factorization.

25612131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046.

The product of its digits is 360, while the sum is 21.

The square root of 25612131 is about 5060.8429139818. The cubic root of 25612131 is about 294.7690656504.

Adding to 25612131 its reverse (13121652), we get a palindrome (38733783).

The spelling of 25612131 in words is "twenty-five million, six hundred twelve thousand, one hundred thirty-one".