25655731 has 2 divisors, whose sum is σ = 25655732. Its totient is φ = 25655730.

The previous prime is 25655699. The next prime is 25655743. The reversal of 25655731 is 13755652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25655731 - 2⁵ = 25655699 is a prime.

It is a super-2 number, since 2×25655731² = 1316433066288722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25655831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12827865 + 12827866.

It is an arithmetic number, because the mean of its divisors is an integer number (12827866).

Almost surely, 2^25655731 is an apocalyptic number.

25655731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25655731 is an equidigital number, since it uses as much as digits as its factorization.

25655731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 34.

The square root of 25655731 is about 5065.1486651430. The cubic root of 25655731 is about 294.9362344223.

The spelling of 25655731 in words is "twenty-five million, six hundred fifty-five thousand, seven hundred thirty-one".