25512931 has 2 divisors, whose sum is σ = 25512932. Its totient is φ = 25512930.

The previous prime is 25512917. The next prime is 25512959. The reversal of 25512931 is 13921552.

It is an a-pointer prime, because the next prime (25512959) can be obtained adding 25512931 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25512931 - 2⁵ = 25512899 is a prime.

It is a super-2 number, since 2×25512931² = 1301819296421522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25512931.

It is not a weakly prime, because it can be changed into another prime (25512901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756465 + 12756466.

It is an arithmetic number, because the mean of its divisors is an integer number (12756466).

Almost surely, 2^25512931 is an apocalyptic number.

25512931 is a deficient number, since it is larger than the sum of its proper divisors (1).

25512931 is an equidigital number, since it uses as much as digits as its factorization.

25512931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 25512931 is about 5051.0326666930. The cubic root of 25512931 is about 294.3880102225.

The spelling of 25512931 in words is "twenty-five million, five hundred twelve thousand, nine hundred thirty-one".