13538594531 has 12 divisors (see below), whose sum is σ = 17007161136. Its totient is φ = 10549553520.

The previous prime is 13538594519. The next prime is 13538594549. The reversal of 13538594531 is 13549583531.

It is not a de Polignac number, because 13538594531 - 2⁶ = 13538594467 is a prime.

It is a super-2 number, since 2×13538594531² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13538594731) 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, 7991240 + ... + 7992933.

It is an arithmetic number, because the mean of its divisors is an integer number (1417263428).

Almost surely, 2^13538594531 is an apocalyptic number.

13538594531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13538594531 is a deficient number, since it is larger than the sum of its proper divisors (3468566605).

13538594531 is a wasteful number, since it uses less digits than its factorization.

13538594531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984202 (or 15984191 counting only the distinct ones).

The product of its digits is 972000, while the sum is 47.

The spelling of 13538594531 in words is "thirteen billion, five hundred thirty-eight million, five hundred ninety-four thousand, five hundred thirty-one".