13525534431 has 12 divisors (see below), whose sum is σ = 20210569080. Its totient is φ = 8706090960.

The previous prime is 13525534423. The next prime is 13525534447. The reversal of 13525534431 is 13443552531.

13525534431 is a `hidden beast` number, since 1 + 35 + 2 + 553 + 44 + 31 = 666.

It is not a de Polignac number, because 13525534431 - 2³ = 13525534423 is a prime.

It is a super-2 number, since 2×13525534431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13525534471) 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, 25910725 + ... + 25911246.

It is an arithmetic number, because the mean of its divisors is an integer number (1684214090).

Almost surely, 2^13525534431 is an apocalyptic number.

13525534431 is a deficient number, since it is larger than the sum of its proper divisors (6685034649).

13525534431 is a wasteful number, since it uses less digits than its factorization.

13525534431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51822006 (or 51822003 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 13525534431 in words is "thirteen billion, five hundred twenty-five million, five hundred thirty-four thousand, four hundred thirty-one".