25656131 has 2 divisors, whose sum is σ = 25656132. Its totient is φ = 25656130.

The previous prime is 25656107. The next prime is 25656157. The reversal of 25656131 is 13165652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25656131 - 2⁶ = 25656067 is a prime.

It is a super-2 number, since 2×25656131² = 1316474115778322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25656094 and 25656103.

It is not a weakly prime, because it can be changed into another prime (25656101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828065 + 12828066.

It is an arithmetic number, because the mean of its divisors is an integer number (12828066).

Almost surely, 2^25656131 is an apocalyptic number.

25656131 is a deficient number, since it is larger than the sum of its proper divisors (1).

25656131 is an equidigital number, since it uses as much as digits as its factorization.

25656131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 29.

The square root of 25656131 is about 5065.1881505034. The cubic root of 25656131 is about 294.9377672037.

The spelling of 25656131 in words is "twenty-five million, six hundred fifty-six thousand, one hundred thirty-one".