25131012525 has 36 divisors (see below), whose sum is σ = 46110316980. Its totient is φ = 13076294400.

The previous prime is 25131012523. The next prime is 25131012551. The reversal of 25131012525 is 52521013152.

25131012525 is a `hidden beast` number, since 2 + 5 + 131 + 0 + 1 + 2 + 525 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 8370603081 + 16760409444 = 91491^2 + 129462^2 .

It is not a de Polignac number, because 25131012525 - 2¹ = 25131012523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131012521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1352890 + ... + 1371339.

Almost surely, 2^25131012525 is an apocalyptic number.

25131012525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25131012525 is a deficient number, since it is larger than the sum of its proper divisors (20979304455).

25131012525 is a wasteful number, since it uses less digits than its factorization.

25131012525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724286 (or 2724278 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 25131012525 its reverse (52521013152), we get a palindrome (77652025677).

The spelling of 25131012525 in words is "twenty-five billion, one hundred thirty-one million, twelve thousand, five hundred twenty-five".