13531202523 has 12 divisors (see below), whose sum is σ = 20268962168. Its totient is φ = 9020801520.

The previous prime is 13531202467. The next prime is 13531202533. The reversal of 13531202523 is 32520213531.

It is a happy number.

13531202523 is a `hidden beast` number, since 13 + 5 + 3 + 120 + 2 + 523 = 666.

It is not a de Polignac number, because 13531202523 - 2⁶ = 13531202459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13531202533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27841738 + ... + 27842223.

Almost surely, 2^13531202523 is an apocalyptic number.

13531202523 is a deficient number, since it is larger than the sum of its proper divisors (6737759645).

13531202523 is an frugal number, since it uses more digits than its factorization.

13531202523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55683976 (or 55683964 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The spelling of 13531202523 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, five hundred twenty-three".