320513013 has 12 divisors (see below), whose sum is σ = 473730400. Its totient is φ = 208705896.

The previous prime is 320513003. The next prime is 320513021. The reversal of 320513013 is 310315023.

It is not a de Polignac number, because 320513013 - 2⁸ = 320512757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320513003) 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, 413713 + ... + 414486.

Almost surely, 2^320513013 is an apocalyptic number.

It is an amenable number.

320513013 is a deficient number, since it is larger than the sum of its proper divisors (153217387).

320513013 is a wasteful number, since it uses less digits than its factorization.

320513013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828248 (or 828245 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 320513013 is about 17902.8772268594. The cubic root of 320513013 is about 684.3557001375.

Adding to 320513013 its reverse (310315023), we get a palindrome (630828036).

The spelling of 320513013 in words is "three hundred twenty million, five hundred thirteen thousand, thirteen".