320013321 has 8 divisors (see below), whose sum is σ = 451783584. Its totient is φ = 200792640.

The previous prime is 320013299. The next prime is 320013359. The reversal of 320013321 is 123310023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320013321 - 2⁷ = 320013193 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320013321.

It is not an unprimeable number, because it can be changed into a prime (320513321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3137335 + ... + 3137436.

It is an arithmetic number, because the mean of its divisors is an integer number (56472948).

Almost surely, 2^320013321 is an apocalyptic number.

It is an amenable number.

320013321 is a deficient number, since it is larger than the sum of its proper divisors (131770263).

320013321 is a wasteful number, since it uses less digits than its factorization.

320013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6274791.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 320013321 is about 17888.9161493926. The cubic root of 320013321 is about 683.9998696180. Note that the first 3 decimals are identical.

Adding to 320013321 its reverse (123310023), we get a palindrome (443323344).

The spelling of 320013321 in words is "three hundred twenty million, thirteen thousand, three hundred twenty-one".