313971518117 has 12 divisors (see below), whose sum is σ = 342792489420. Its totient is φ = 287189908992.

The previous prime is 313971518111. The next prime is 313971518131. The reversal of 313971518117 is 711815179313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 262798744321 + 51172773796 = 512639^2 + 226214^2 .

It is not a de Polignac number, because 313971518117 - 2⁴ = 313971518101 is a prime.

It is a super-2 number, since 2×313971518117² (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 (313971518111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14984828 + ... + 15005765.

It is an arithmetic number, because the mean of its divisors is an integer number (28566040785).

Almost surely, 2^313971518117 is an apocalyptic number.

It is an amenable number.

313971518117 is a deficient number, since it is larger than the sum of its proper divisors (28820971303).

313971518117 is a wasteful number, since it uses less digits than its factorization.

313971518117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29990660 (or 29990641 counting only the distinct ones).

The product of its digits is 158760, while the sum is 47.

The spelling of 313971518117 in words is "three hundred thirteen billion, nine hundred seventy-one million, five hundred eighteen thousand, one hundred seventeen".