31045040631812 has 12 divisors (see below), whose sum is σ = 54331617804240. Its totient is φ = 15521721259176.

The previous prime is 31045040631779. The next prime is 31045040631823. The reversal of 31045040631812 is 21813604054013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199676762 + ... + 199832177.

It is an arithmetic number, because the mean of its divisors is an integer number (4527634817020).

Almost surely, 2^{31045040631812} is an apocalyptic number.

It is an amenable number.

31045040631812 is a deficient number, since it is larger than the sum of its proper divisors (23286577172428).

31045040631812 is a wasteful number, since it uses less digits than its factorization.

31045040631812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399528370 (or 399528368 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

Adding to 31045040631812 its reverse (21813604054013), we get a palindrome (52858644685825).

The spelling of 31045040631812 in words is "thirty-one trillion, forty-five billion, forty million, six hundred thirty-one thousand, eight hundred twelve".