320331013 has 12 divisors (see below), whose sum is σ = 349236160. Its totient is φ = 292992336.

The previous prime is 320330999. The next prime is 320331019. The reversal of 320331013 is 310133023.

It is not a de Polignac number, because 320331013 - 2⁵ = 320330981 is a prime.

It is a super-2 number, since 2×320331013² = 205223915779212338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320331019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5956 + ... + 26002.

Almost surely, 2^320331013 is an apocalyptic number.

It is an amenable number.

320331013 is a deficient number, since it is larger than the sum of its proper divisors (28905147).

320331013 is a wasteful number, since it uses less digits than its factorization.

320331013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20124 (or 20095 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 320331013 is about 17897.7935232251. The cubic root of 320331013 is about 684.2261408423.

Adding to 320331013 its reverse (310133023), we get a palindrome (630464036).

The spelling of 320331013 in words is "three hundred twenty million, three hundred thirty-one thousand, thirteen".