320321233 has 16 divisors (see below), whose sum is σ = 346655232. Its totient is φ = 295344000.

The previous prime is 320321227. The next prime is 320321251. The reversal of 320321233 is 332123023.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 320321233 - 2⁵ = 320321201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320321233.

It is not an unprimeable number, because it can be changed into a prime (320321203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51723 + ... + 57583.

It is an arithmetic number, because the mean of its divisors is an integer number (21665952).

Almost surely, 2^320321233 is an apocalyptic number.

It is an amenable number.

320321233 is a deficient number, since it is larger than the sum of its proper divisors (26333999).

320321233 is a wasteful number, since it uses less digits than its factorization.

320321233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5976.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 320321233 is about 17897.5203031034. The cubic root of 320321233 is about 684.2191774207.

Adding to 320321233 its reverse (332123023), we get a palindrome (652444256).

The spelling of 320321233 in words is "three hundred twenty million, three hundred twenty-one thousand, two hundred thirty-three".