31020323312 has 20 divisors (see below), whose sum is σ = 65565683736. Its totient is φ = 14100146880.

The previous prime is 31020323287. The next prime is 31020323333. The reversal of 31020323312 is 21332302013.

It is a congruent number.

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, 88125743 + ... + 88126094.

Almost surely, 2^31020323312 is an apocalyptic number.

It is an amenable number.

31020323312 is an abundant number, since it is smaller than the sum of its proper divisors (34545360424).

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

31020323312 is a wasteful number, since it uses less digits than its factorization.

31020323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176251856 (or 176251850 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31020323312 its reverse (21332302013), we get a palindrome (52352625325).

The spelling of 31020323312 in words is "thirty-one billion, twenty million, three hundred twenty-three thousand, three hundred twelve".