31313023002 has 12 divisors (see below), whose sum is σ = 67844883210. Its totient is φ = 10437674328.

The previous prime is 31313022989. The next prime is 31313023013. The reversal of 31313023002 is 20032031313.

31313023002 is a `hidden beast` number, since 31 + 31 + 302 + 300 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28824908841 + 2488114161 = 169779^2 + 49881^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1739612389 = 31313023002 / (3 + 1 + 3 + 1 + 3 + 0 + 2 + 3 + 0 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 869806177 + ... + 869806212.

Almost surely, 2^31313023002 is an apocalyptic number.

31313023002 is an abundant number, since it is smaller than the sum of its proper divisors (36531860208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31313023002 is a wasteful number, since it uses less digits than its factorization.

31313023002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739612397 (or 1739612394 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31313023002 its reverse (20032031313), we get a palindrome (51345054315).

The spelling of 31313023002 in words is "thirty-one billion, three hundred thirteen million, twenty-three thousand, two".