31321331396 has 6 divisors (see below), whose sum is σ = 54812329950. Its totient is φ = 15660665696.

The previous prime is 31321331383. The next prime is 31321331407. The reversal of 31321331396 is 69313312313.

It can be written as a sum of positive squares in only one way, i.e., 31304224900 + 17106496 = 176930^2 + 4136^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3915166421 + ... + 3915166428.

It is an arithmetic number, because the mean of its divisors is an integer number (9135388325).

Almost surely, 2^31321331396 is an apocalyptic number.

It is an amenable number.

31321331396 is a deficient number, since it is larger than the sum of its proper divisors (23490998554).

31321331396 is a wasteful number, since it uses less digits than its factorization.

31321331396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7830332853 (or 7830332851 counting only the distinct ones).

The product of its digits is 26244, while the sum is 35.

The spelling of 31321331396 in words is "thirty-one billion, three hundred twenty-one million, three hundred thirty-one thousand, three hundred ninety-six".