13531115525 has 48 divisors (see below), whose sum is σ = 18526076160. Its totient is φ = 9765100800.

The previous prime is 13531115509. The next prime is 13531115573. The reversal of 13531115525 is 52551113531.

It is not a de Polignac number, because 13531115525 - 2⁴ = 13531115509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13531115491 and 13531115500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 817835 + ... + 834215.

It is an arithmetic number, because the mean of its divisors is an integer number (385959920).

Almost surely, 2^13531115525 is an apocalyptic number.

It is an amenable number.

13531115525 is a deficient number, since it is larger than the sum of its proper divisors (4994960635).

13531115525 is a wasteful number, since it uses less digits than its factorization.

13531115525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16494 (or 16489 counting only the distinct ones).

The product of its digits is 11250, while the sum is 32.

The spelling of 13531115525 in words is "thirteen billion, five hundred thirty-one million, one hundred fifteen thousand, five hundred twenty-five".