12531815625 has 192 divisors, whose sum is σ = 25918341120. Its totient is φ = 5255040000.

The previous prime is 12531815563. The next prime is 12531815651. The reversal of 12531815625 is 52651813521.

It is not a de Polignac number, because 12531815625 - 2¹² = 12531811529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 52434256 + ... + 52434494.

It is an arithmetic number, because the mean of its divisors is an integer number (134991360).

Almost surely, 2^12531815625 is an apocalyptic number.

12531815625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12531815625 is an abundant number, since it is smaller than the sum of its proper divisors (13386525495).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12531815625 is an equidigital number, since it uses as much as digits as its factorization.

12531815625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 318 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The spelling of 12531815625 in words is "twelve billion, five hundred thirty-one million, eight hundred fifteen thousand, six hundred twenty-five".