320002321 has 8 divisors (see below), whose sum is σ = 323658720. Its totient is φ = 316353408.

The previous prime is 320002303. The next prime is 320002337. The reversal of 320002321 is 123200023.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 320002321 - 2¹⁵ = 319969553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320002021) 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, 160710 + ... + 162688.

It is an arithmetic number, because the mean of its divisors is an integer number (40457340).

Almost surely, 2^320002321 is an apocalyptic number.

It is an amenable number.

320002321 is a deficient number, since it is larger than the sum of its proper divisors (3656399).

320002321 is a wasteful number, since it uses less digits than its factorization.

320002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320002321 is about 17888.6086938029. The cubic root of 320002321 is about 683.9920323559.

Adding to 320002321 its reverse (123200023), we get a palindrome (443202344).

The spelling of 320002321 in words is "three hundred twenty million, two thousand, three hundred twenty-one".