31241979537 has 4 divisors (see below), whose sum is σ = 41655972720. Its totient is φ = 20827986356.

The previous prime is 31241979529. The next prime is 31241979557. The reversal of 31241979537 is 73597914213.

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.

It is a cyclic number.

It is not a de Polignac number, because 31241979537 - 2³ = 31241979529 is a prime.

It is a super-2 number, since 2×31241979537² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31241979537.

It is not an unprimeable number, because it can be changed into a prime (31241979557) 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, 5206996587 + ... + 5206996592.

It is an arithmetic number, because the mean of its divisors is an integer number (10413993180).

Almost surely, 2^31241979537 is an apocalyptic number.

It is an amenable number.

31241979537 is a deficient number, since it is larger than the sum of its proper divisors (10413993183).

31241979537 is a wasteful number, since it uses less digits than its factorization.

31241979537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10413993182.

The product of its digits is 1428840, while the sum is 51.

The spelling of 31241979537 in words is "thirty-one billion, two hundred forty-one million, nine hundred seventy-nine thousand, five hundred thirty-seven".