313231002320 has 80 divisors (see below), whose sum is σ = 732128265792. Its totient is φ = 124627937280.

The previous prime is 313231002319. The next prime is 313231002323. The reversal of 313231002320 is 23200132313.

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

It is a super-2 number, since 2×313231002320² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 313231002292 and 313231002301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313231002323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37857704 + ... + 37865976.

Almost surely, 2^313231002320 is an apocalyptic number.

It is an amenable number.

313231002320 is an abundant number, since it is smaller than the sum of its proper divisors (418897263472).

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

313231002320 is a wasteful number, since it uses less digits than its factorization.

313231002320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740 (or 10734 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 313231002320 its reverse (23200132313), we get a palindrome (336431134633).

The spelling of 313231002320 in words is "three hundred thirteen billion, two hundred thirty-one million, two thousand, three hundred twenty".