320318563 has 2 divisors, whose sum is σ = 320318564. Its totient is φ = 320318562.

The previous prime is 320318533. The next prime is 320318623. The reversal of 320318563 is 365813023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320318563 - 2¹³ = 320310371 is a prime.

It is not a weakly prime, because it can be changed into another prime (320318513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160159281 + 160159282.

It is an arithmetic number, because the mean of its divisors is an integer number (160159282).

Almost surely, 2^320318563 is an apocalyptic number.

320318563 is a deficient number, since it is larger than the sum of its proper divisors (1).

320318563 is an equidigital number, since it uses as much as digits as its factorization.

320318563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 320318563 is about 17897.4457116092. The cubic root of 320318563 is about 684.2172763392.

The spelling of 320318563 in words is "three hundred twenty million, three hundred eighteen thousand, five hundred sixty-three".