313131023220 has 24 divisors (see below), whose sum is σ = 876766865184. Its totient is φ = 83501606176.

The previous prime is 313131023213. The next prime is 313131023237. The reversal of 313131023220 is 22320131313.

It is a congruent number.

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, 2609425134 + ... + 2609425253.

It is an arithmetic number, because the mean of its divisors is an integer number (36531952716).

Almost surely, 2^313131023220 is an apocalyptic number.

313131023220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

313131023220 is an abundant number, since it is smaller than the sum of its proper divisors (563635841964).

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

313131023220 is a wasteful number, since it uses less digits than its factorization.

313131023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218850399 (or 5218850397 counting only the distinct ones).

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

Adding to 313131023220 its reverse (22320131313), we get a palindrome (335451154533).

The spelling of 313131023220 in words is "three hundred thirteen billion, one hundred thirty-one million, twenty-three thousand, two hundred twenty".