31320013000220 has 72 divisors (see below), whose sum is σ = 76687836644160. Its totient is φ = 10713375200640.

The previous prime is 31320013000163. The next prime is 31320013000231. The reversal of 31320013000220 is 2200031002313.

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, 36653255 + ... + 37498014.

It is an arithmetic number, because the mean of its divisors is an integer number (1065108842280).

Almost surely, 2^{31320013000220} is an apocalyptic number.

It is an amenable number.

31320013000220 is an abundant number, since it is smaller than the sum of its proper divisors (45367823643940).

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

31320013000220 is a wasteful number, since it uses less digits than its factorization.

31320013000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74151723 (or 74151714 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31320013000220 its reverse (2200031002313), we get a palindrome (33520044002533).

The spelling of 31320013000220 in words is "thirty-one trillion, three hundred twenty billion, thirteen million, two hundred twenty", and thus it is an aban number.