320031013 has 4 divisors (see below), whose sum is σ = 326069388. Its totient is φ = 313992640.

The previous prime is 320030999. The next prime is 320031053. The reversal of 320031013 is 310130023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178944129 + 141086884 = 13377^2 + 11878^2 .

It is a cyclic number.

It is not a de Polignac number, because 320031013 - 2²⁵ = 286476581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320030984 and 320031002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320031053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3019108 + ... + 3019213.

It is an arithmetic number, because the mean of its divisors is an integer number (81517347).

Almost surely, 2^320031013 is an apocalyptic number.

It is an amenable number.

320031013 is a deficient number, since it is larger than the sum of its proper divisors (6038375).

320031013 is an equidigital number, since it uses as much as digits as its factorization.

320031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038374.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 320031013 is about 17889.4106386991. The cubic root of 320031013 is about 684.0124744086.

Adding to 320031013 its reverse (310130023), we get a palindrome (630161036).

The spelling of 320031013 in words is "three hundred twenty million, thirty-one thousand, thirteen".