31318819713 has 6 divisors (see below), whose sum is σ = 45238295154. Its totient is φ = 20879213136.

The previous prime is 31318819703. The next prime is 31318819771. The reversal of 31318819713 is 31791881313.

It can be written as a sum of positive squares in only one way, i.e., 27214111089 + 4104708624 = 164967^2 + 64068^2 .

It is not a de Polignac number, because 31318819713 - 2⁸ = 31318819457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31318819703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739934420 + ... + 1739934437.

It is an arithmetic number, because the mean of its divisors is an integer number (7539715859).

Almost surely, 2^31318819713 is an apocalyptic number.

It is an amenable number.

31318819713 is a deficient number, since it is larger than the sum of its proper divisors (13919475441).

31318819713 is a wasteful number, since it uses less digits than its factorization.

31318819713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479868863 (or 3479868860 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The spelling of 31318819713 in words is "thirty-one billion, three hundred eighteen million, eight hundred nineteen thousand, seven hundred thirteen".