31732513913 has 4 divisors (see below), whose sum is σ = 31960805520. Its totient is φ = 31504222308.

The previous prime is 31732513903. The next prime is 31732513919. The reversal of 31732513913 is 31931523713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31931523713 = 15667 ⋅2038139.

It is a cyclic number.

It is not a de Polignac number, because 31732513913 - 2¹² = 31732509817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31732513919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114145595 + ... + 114145872.

It is an arithmetic number, because the mean of its divisors is an integer number (7990201380).

Almost surely, 2^31732513913 is an apocalyptic number.

It is an amenable number.

31732513913 is a deficient number, since it is larger than the sum of its proper divisors (228291607).

31732513913 is a wasteful number, since it uses less digits than its factorization.

31732513913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228291606.

The product of its digits is 51030, while the sum is 38.

The spelling of 31732513913 in words is "thirty-one billion, seven hundred thirty-two million, five hundred thirteen thousand, nine hundred thirteen".