31973803045631 has 4 divisors (see below), whose sum is σ = 31973814579264. Its totient is φ = 31973791512000.

The previous prime is 31973803045621. The next prime is 31973803045643. The reversal of 31973803045631 is 13654030837913.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31973803045631 - 2¹⁰ = 31973803044607 is a prime.

It is a super-2 number, since 2×31973803045631² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31973803045621) 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, 1184786 + ... + 8084016.

It is an arithmetic number, because the mean of its divisors is an integer number (7993453644816).

Almost surely, 2^{31973803045631} is an apocalyptic number.

31973803045631 is a deficient number, since it is larger than the sum of its proper divisors (11533633).

31973803045631 is an equidigital number, since it uses as much as digits as its factorization.

31973803045631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11533632.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 31973803045631 in words is "thirty-one trillion, nine hundred seventy-three billion, eight hundred three million, forty-five thousand, six hundred thirty-one".