320324321 has 2 divisors, whose sum is σ = 320324322. Its totient is φ = 320324320.

The previous prime is 320324311. The next prime is 320324339. The reversal of 320324321 is 123423023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287777296 + 32547025 = 16964^2 + 5705^2 .

It is an emirp because it is prime and its reverse (123423023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320324321 is a prime.

It is a super-2 number, since 2×320324321² = 205215341248222082, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 320324293 and 320324302.

It is not a weakly prime, because it can be changed into another prime (320324311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160162160 + 160162161.

It is an arithmetic number, because the mean of its divisors is an integer number (160162161).

Almost surely, 2^320324321 is an apocalyptic number.

It is an amenable number.

320324321 is a deficient number, since it is larger than the sum of its proper divisors (1).

320324321 is an equidigital number, since it uses as much as digits as its factorization.

320324321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 320324321 is about 17897.6065718297. The cubic root of 320324321 is about 684.2213761115.

Adding to 320324321 its reverse (123423023), we get a palindrome (443747344).

The spelling of 320324321 in words is "three hundred twenty million, three hundred twenty-four thousand, three hundred twenty-one".