320441321 has 2 divisors, whose sum is σ = 320441322. Its totient is φ = 320441320.

The previous prime is 320441309. The next prime is 320441323. The reversal of 320441321 is 123144023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206784400 + 113656921 = 14380^2 + 10661^2 .

It is a cyclic number.

It is not a de Polignac number, because 320441321 - 2⁶ = 320441257 is a prime.

Together with 320441323, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 320441293 and 320441302.

It is not a weakly prime, because it can be changed into another prime (320441323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160220660 + 160220661.

It is an arithmetic number, because the mean of its divisors is an integer number (160220661).

Almost surely, 2^320441321 is an apocalyptic number.

It is an amenable number.

320441321 is a deficient number, since it is larger than the sum of its proper divisors (1).

320441321 is an equidigital number, since it uses as much as digits as its factorization.

320441321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 320441321 is about 17900.8748668885. The cubic root of 320441321 is about 684.3046710213.

Adding to 320441321 its reverse (123144023), we get a palindrome (443585344).

The spelling of 320441321 in words is "three hundred twenty million, four hundred forty-one thousand, three hundred twenty-one".