13531521325 has 12 divisors (see below), whose sum is σ = 19176099040. Its totient is φ = 9278757360.

The previous prime is 13531521317. The next prime is 13531521343. The reversal of 13531521325 is 52312513531.

It is not a de Polignac number, because 13531521325 - 2³ = 13531521317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38661315 + ... + 38661664.

Almost surely, 2^13531521325 is an apocalyptic number.

It is an amenable number.

13531521325 is a deficient number, since it is larger than the sum of its proper divisors (5644577715).

13531521325 is an equidigital number, since it uses as much as digits as its factorization.

13531521325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77322996 (or 77322991 counting only the distinct ones).

The product of its digits is 13500, while the sum is 31.

The spelling of 13531521325 in words is "thirteen billion, five hundred thirty-one million, five hundred twenty-one thousand, three hundred twenty-five".