31310321312 has 36 divisors (see below), whose sum is σ = 65057299146. Its totient is φ = 14831199360.

The previous prime is 31310321297. The next prime is 31310321333. The reversal of 31310321312 is 21312301313.

It can be written as a sum of positive squares in only one way, i.e., 16909361296 + 14400960016 = 130036^2 + 120004^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1343639 + ... + 1366742.

Almost surely, 2^31310321312 is an apocalyptic number.

31310321312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31310321312 is an abundant number, since it is smaller than the sum of its proper divisors (33746977834).

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

31310321312 is a wasteful number, since it uses less digits than its factorization.

31310321312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710429 (or 2710402 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31310321312 its reverse (21312301313), we get a palindrome (52622622625).

The spelling of 31310321312 in words is "thirty-one billion, three hundred ten million, three hundred twenty-one thousand, three hundred twelve".