320465081 has 2 divisors, whose sum is σ = 320465082. Its totient is φ = 320465080.

The previous prime is 320465017. The next prime is 320465161. The reversal of 320465081 is 180564023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273075625 + 47389456 = 16525^2 + 6884^2 .

It is a cyclic number.

It is not a de Polignac number, because 320465081 - 2⁶ = 320465017 is a prime.

It is a super-2 number, since 2×320465081² = 205395736280673122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320465281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160232540 + 160232541.

It is an arithmetic number, because the mean of its divisors is an integer number (160232541).

Almost surely, 2^320465081 is an apocalyptic number.

It is an amenable number.

320465081 is a deficient number, since it is larger than the sum of its proper divisors (1).

320465081 is an equidigital number, since it uses as much as digits as its factorization.

320465081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 320465081 is about 17901.5385093014. The cubic root of 320465081 is about 684.3215838184.

The spelling of 320465081 in words is "three hundred twenty million, four hundred sixty-five thousand, eighty-one".