31564313516523 has 8 divisors (see below), whose sum is σ = 42085844489536. Its totient is φ = 21042829110600.

The previous prime is 31564313516507. The next prime is 31564313516557. The reversal of 31564313516523 is 32561531346513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31564313516523 - 2⁴ = 31564313516507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31564313516423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10028233 + ... + 12794298.

It is an arithmetic number, because the mean of its divisors is an integer number (5260730561192).

Almost surely, 2^{31564313516523} is an apocalyptic number.

31564313516523 is a deficient number, since it is larger than the sum of its proper divisors (10521530973013).

31564313516523 is a wasteful number, since it uses less digits than its factorization.

31564313516523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23283545.

The product of its digits is 2916000, while the sum is 48.

The spelling of 31564313516523 in words is "thirty-one trillion, five hundred sixty-four billion, three hundred thirteen million, five hundred sixteen thousand, five hundred twenty-three".