320422481 has 2 divisors, whose sum is σ = 320422482. Its totient is φ = 320422480.

The previous prime is 320422393. The next prime is 320422493. The reversal of 320422481 is 184224023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236882881 + 83539600 = 15391^2 + 9140^2 .

It is an emirp because it is prime and its reverse (184224023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320422481 is a prime.

It is a super-2 number, since 2×320422481² = 205341132660390722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320422481.

It is not a weakly prime, because it can be changed into another prime (320422981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160211240 + 160211241.

It is an arithmetic number, because the mean of its divisors is an integer number (160211241).

Almost surely, 2^320422481 is an apocalyptic number.

It is an amenable number.

320422481 is a deficient number, since it is larger than the sum of its proper divisors (1).

320422481 is an equidigital number, since it uses as much as digits as its factorization.

320422481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 320422481 is about 17900.3486278899. The cubic root of 320422481 is about 684.2912597747.

The spelling of 320422481 in words is "three hundred twenty million, four hundred twenty-two thousand, four hundred eighty-one".