320422321 has 2 divisors, whose sum is σ = 320422322. Its totient is φ = 320422320.

The previous prime is 320422253. The next prime is 320422337. The reversal of 320422321 is 123224023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320410000 + 12321 = 17900^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 320422321 - 2¹⁷ = 320291249 is a prime.

It is not a weakly prime, because it can be changed into another prime (320422021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160211160 + 160211161.

It is an arithmetic number, because the mean of its divisors is an integer number (160211161).

Almost surely, 2^320422321 is an apocalyptic number.

It is an amenable number.

320422321 is a deficient number, since it is larger than the sum of its proper divisors (1).

320422321 is an equidigital number, since it uses as much as digits as its factorization.

320422321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 320422321 is about 17900.3441587026. The cubic root of 320422321 is about 684.2911458765.

Adding to 320422321 its reverse (123224023), we get a palindrome (443646344).

The spelling of 320422321 in words is "three hundred twenty million, four hundred twenty-two thousand, three hundred twenty-one".