31013030320 has 80 divisors (see below), whose sum is σ = 72614772000. Its totient is φ = 12317865984.

The previous prime is 31013030311. The next prime is 31013030353. The reversal of 31013030320 is 2303031013.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31013030294 and 31013030303.

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, 7490811 + ... + 7494949.

It is an arithmetic number, because the mean of its divisors is an integer number (907684650).

Almost surely, 2^31013030320 is an apocalyptic number.

It is an amenable number.

31013030320 is an abundant number, since it is smaller than the sum of its proper divisors (41601741680).

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

31013030320 is a wasteful number, since it uses less digits than its factorization.

31013030320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790 (or 4784 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31013030320 its reverse (2303031013), we get a palindrome (33316061333).

The spelling of 31013030320 in words is "thirty-one billion, thirteen million, thirty thousand, three hundred twenty".