31112311320 has 96 divisors (see below), whose sum is σ = 107062974720. Its totient is φ = 7808578560.

The previous prime is 31112311319. The next prime is 31112311343. The reversal of 31112311320 is 2311321113.

31112311320 is a `hidden beast` number, since 3 + 111 + 231 + 1 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31112311293 and 31112311302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2535736 + ... + 2547975.

It is an arithmetic number, because the mean of its divisors is an integer number (1115239320).

Almost surely, 2^31112311320 is an apocalyptic number.

31112311320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31112311320 is an abundant number, since it is smaller than the sum of its proper divisors (75950663400).

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

31112311320 is a wasteful number, since it uses less digits than its factorization.

31112311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083745 (or 5083738 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31112311320 its reverse (2311321113), we get a palindrome (33423632433).

The spelling of 31112311320 in words is "thirty-one billion, one hundred twelve million, three hundred eleven thousand, three hundred twenty".