31113113320 has 64 divisors (see below), whose sum is σ = 74377828800. Its totient is φ = 11680012800.

The previous prime is 31113113299. The next prime is 31113113351. The reversal of 31113113320 is 2331131113.

It is a super-2 number, since 2×31113113320² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109981 + ... + 272620.

It is an arithmetic number, because the mean of its divisors is an integer number (1162153575).

Almost surely, 2^31113113320 is an apocalyptic number.

It is an amenable number.

31113113320 is an abundant number, since it is smaller than the sum of its proper divisors (43264715480).

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

31113113320 is a wasteful number, since it uses less digits than its factorization.

31113113320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382738 (or 382734 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31113113320 its reverse (2331131113), we get a palindrome (33444244433).

The spelling of 31113113320 in words is "thirty-one billion, one hundred thirteen million, one hundred thirteen thousand, three hundred twenty".