320322321 has 48 divisors (see below), whose sum is σ = 517171200. Its totient is φ = 189423360.

The previous prime is 320322307. The next prime is 320322341. The reversal of 320322321 is 123223023.

It is a happy number.

320322321 is a `hidden beast` number, since 3 + 20 + 322 + 321 = 666.

It is not a de Polignac number, because 320322321 - 2⁶ = 320322257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320322294 and 320322303.

It is not an unprimeable number, because it can be changed into a prime (320322341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 917655 + ... + 918003.

It is an arithmetic number, because the mean of its divisors is an integer number (10774400).

Almost surely, 2^320322321 is an apocalyptic number.

It is an amenable number.

320322321 is a deficient number, since it is larger than the sum of its proper divisors (196848879).

320322321 is a wasteful number, since it uses less digits than its factorization.

320322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 320322321 is about 17897.5506983498. The cubic root of 320322321 is about 684.2199520905.

Adding to 320322321 its reverse (123223023), we get a palindrome (443545344).

The spelling of 320322321 in words is "three hundred twenty million, three hundred twenty-two thousand, three hundred twenty-one".