320131313220 has 24 divisors (see below), whose sum is σ = 896367677184. Its totient is φ = 85368350176.

The previous prime is 320131313213. The next prime is 320131313297. The reversal of 320131313220 is 22313131023.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2667760884 + ... + 2667761003.

It is an arithmetic number, because the mean of its divisors is an integer number (37348653216).

Almost surely, 2^320131313220 is an apocalyptic number.

320131313220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320131313220 is an abundant number, since it is smaller than the sum of its proper divisors (576236363964).

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

320131313220 is a wasteful number, since it uses less digits than its factorization.

320131313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335521899 (or 5335521897 counting only the distinct ones).

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

Adding to 320131313220 its reverse (22313131023), we get a palindrome (342444444243).

The spelling of 320131313220 in words is "three hundred twenty billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred twenty".