31113320322 has 32 divisors (see below), whose sum is σ = 71659044864. Its totient is φ = 8821659600.

The previous prime is 31113320317. The next prime is 31113320339. The reversal of 31113320322 is 22302331113.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 2821954 + ... + 2832957.

It is an arithmetic number, because the mean of its divisors is an integer number (2239345152).

Almost surely, 2^31113320322 is an apocalyptic number.

31113320322 is an abundant number, since it is smaller than the sum of its proper divisors (40545724542).

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

31113320322 is a wasteful number, since it uses less digits than its factorization.

31113320322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655054.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31113320322 its reverse (22302331113), we get a palindrome (53415651435).

The spelling of 31113320322 in words is "thirty-one billion, one hundred thirteen million, three hundred twenty thousand, three hundred twenty-two".