31320333231312 has 80 divisors (see below), whose sum is σ = 81046970661888. Its totient is φ = 10422560096640.

The previous prime is 31320333231311. The next prime is 31320333231367. The reversal of 31320333231312 is 21313233302313.

It is a self number, because there is not a number n which added to its sum of digits gives 31320333231312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320333231311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87136153 + ... + 87494855.

Almost surely, 2^{31320333231312} is an apocalyptic number.

It is an amenable number.

31320333231312 is an abundant number, since it is smaller than the sum of its proper divisors (49726637430576).

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

31320333231312 is a wasteful number, since it uses less digits than its factorization.

31320333231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361768 (or 361762 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 30.

Adding to 31320333231312 its reverse (21313233302313), we get a palindrome (52633566533625).

The spelling of 31320333231312 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirty-three million, two hundred thirty-one thousand, three hundred twelve".