315631564631 has 4 divisors (see below), whose sum is σ = 318424764432. Its totient is φ = 312838364832.

The previous prime is 315631564613. The next prime is 315631564643. The reversal of 315631564631 is 136465136513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315631564631 - 2²² = 315627370327 is a prime.

It is a super-2 number, since 2×315631564631² (a number of 24 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 (315631564601) 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, 1396599731 + ... + 1396599956.

It is an arithmetic number, because the mean of its divisors is an integer number (79606191108).

Almost surely, 2^315631564631 is an apocalyptic number.

315631564631 is a deficient number, since it is larger than the sum of its proper divisors (2793199801).

315631564631 is a wasteful number, since it uses less digits than its factorization.

315631564631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793199800.

The product of its digits is 583200, while the sum is 44.

The spelling of 315631564631 in words is "three hundred fifteen billion, six hundred thirty-one million, five hundred sixty-four thousand, six hundred thirty-one".