25500031025 has 24 divisors (see below), whose sum is σ = 38262908160. Its totient is φ = 16457160960.

The previous prime is 25500031021. The next prime is 25500031129. The reversal of 25500031025 is 52013000552.

It is not a de Polignac number, because 25500031025 - 2² = 25500031021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25500031021) 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, 4282745 + ... + 4288694.

It is an arithmetic number, because the mean of its divisors is an integer number (1594287840).

Almost surely, 2^25500031025 is an apocalyptic number.

25500031025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25500031025 is a deficient number, since it is larger than the sum of its proper divisors (12762877135).

25500031025 is a wasteful number, since it uses less digits than its factorization.

25500031025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8571473 (or 8571468 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

Adding to 25500031025 its reverse (52013000552), we get a palindrome (77513031577).

The spelling of 25500031025 in words is "twenty-five billion, five hundred million, thirty-one thousand, twenty-five".