320032321 has 4 divisors (see below), whose sum is σ = 365751232. Its totient is φ = 274313412.

The previous prime is 320032319. The next prime is 320032357. The reversal of 320032321 is 123230023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320032321 - 2¹ = 320032319 is a prime.

It is a super-3 number, since 3×320032321³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320032295 and 320032304.

It is not an unprimeable number, because it can be changed into a prime (320032381) 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, 22859445 + ... + 22859458.

It is an arithmetic number, because the mean of its divisors is an integer number (91437808).

Almost surely, 2^320032321 is an apocalyptic number.

It is an amenable number.

320032321 is a deficient number, since it is larger than the sum of its proper divisors (45718911).

320032321 is an equidigital number, since it uses as much as digits as its factorization.

320032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45718910.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 320032321 is about 17889.4471966017. The cubic root of 320032321 is about 684.0134062840.

Adding to 320032321 its reverse (123230023), we get a palindrome (443262344).

The spelling of 320032321 in words is "three hundred twenty million, thirty-two thousand, three hundred twenty-one".