31310213020312 has 32 divisors (see below), whose sum is σ = 59309074346400. Its totient is φ = 15494570560000.

The previous prime is 31310213020283. The next prime is 31310213020357. The reversal of 31310213020312 is 21302031201313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4654012 + ... + 9180427.

It is an arithmetic number, because the mean of its divisors is an integer number (1853408573325).

Almost surely, 2^{31310213020312} is an apocalyptic number.

It is an amenable number.

31310213020312 is a deficient number, since it is larger than the sum of its proper divisors (27998861326088).

31310213020312 is a wasteful number, since it uses less digits than its factorization.

31310213020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13837347 (or 13837343 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31310213020312 its reverse (21302031201313), we get a palindrome (52612244221625).

The spelling of 31310213020312 in words is "thirty-one trillion, three hundred ten billion, two hundred thirteen million, twenty thousand, three hundred twelve".