13597079531 has 6 divisors (see below), whose sum is σ = 15817010940. Its totient is φ = 11654639556.

The previous prime is 13597079501. The next prime is 13597079557.

13597079531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13597079531 - 2⁶ = 13597079467 is a prime.

It is a super-2 number, since 2×13597079531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13597079531.

It is not an unprimeable number, because it can be changed into a prime (13597079501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138745661 + ... + 138745758.

It is an arithmetic number, because the mean of its divisors is an integer number (2636168490).

Almost surely, 2^13597079531 is an apocalyptic number.

13597079531 is a deficient number, since it is larger than the sum of its proper divisors (2219931409).

13597079531 is an equidigital number, since it uses as much as digits as its factorization.

13597079531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277491433 (or 277491426 counting only the distinct ones).

The product of its (nonzero) digits is 893025, while the sum is 50.

The spelling of 13597079531 in words is "thirteen billion, five hundred ninety-seven million, seventy-nine thousand, five hundred thirty-one".