31313021313032 has 16 divisors (see below), whose sum is σ = 58712196961260. Its totient is φ = 15656435456704.

The previous prime is 31313021313031. The next prime is 31313021313073. The reversal of 31313021313032 is 23031312031313.

It can be written as a sum of positive squares in 2 ways, for example, as 30639922491556 + 673098821476 = 5535334^2 + 820426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31313021312992 and 31313021313010.

It is not an unprimeable number, because it can be changed into a prime (31313021313031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7610243 + ... + 10979154.

Almost surely, 2^{31313021313032} is an apocalyptic number.

It is an amenable number.

31313021313032 is a deficient number, since it is larger than the sum of its proper divisors (27399175648228).

31313021313032 is a wasteful number, since it uses less digits than its factorization.

31313021313032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18799960 (or 18799956 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31313021313032 its reverse (23031312031313), we get a palindrome (54344333344345).

The spelling of 31313021313032 in words is "thirty-one trillion, three hundred thirteen billion, twenty-one million, three hundred thirteen thousand, thirty-two".