313131313220 has 24 divisors (see below), whose sum is σ = 717355372608. Its totient is φ = 113865932000.

The previous prime is 313131313219. The next prime is 313131313247. The reversal of 313131313220 is 22313131313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711661856 + ... + 711662295.

It is an arithmetic number, because the mean of its divisors is an integer number (29889807192).

Almost surely, 2^313131313220 is an apocalyptic number.

It is an amenable number.

313131313220 is an abundant number, since it is smaller than the sum of its proper divisors (404224059388).

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

313131313220 is a wasteful number, since it uses less digits than its factorization.

313131313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423324171 (or 1423324169 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 313131313220 its reverse (22313131313), we get a palindrome (335444444533).

The spelling of 313131313220 in words is "three hundred thirteen billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred twenty".