12515251525 has 24 divisors (see below), whose sum is σ = 17740382400. Its totient is φ = 8579717760.

The previous prime is 12515251457. The next prime is 12515251621. The reversal of 12515251525 is 52515251521.

It is not a de Polignac number, because 12515251525 - 2²¹ = 12513154373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1017462 + ... + 1029688.

It is an arithmetic number, because the mean of its divisors is an integer number (739182600).

Almost surely, 2^12515251525 is an apocalyptic number.

It is an amenable number.

12515251525 is a deficient number, since it is larger than the sum of its proper divisors (5225130875).

12515251525 is a wasteful number, since it uses less digits than its factorization.

12515251525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18093 (or 18088 counting only the distinct ones).

The product of its digits is 25000, while the sum is 34.

The spelling of 12515251525 in words is "twelve billion, five hundred fifteen million, two hundred fifty-one thousand, five hundred twenty-five".