320451563 has 4 divisors (see below), whose sum is σ = 320513760. Its totient is φ = 320389368.

The previous prime is 320451559. The next prime is 320451577. The reversal of 320451563 is 365154023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320451563 - 2² = 320451559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320451503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22595 + ... + 33932.

It is an arithmetic number, because the mean of its divisors is an integer number (80128440).

Almost surely, 2^320451563 is an apocalyptic number.

320451563 is a deficient number, since it is larger than the sum of its proper divisors (62197).

320451563 is an equidigital number, since it uses as much as digits as its factorization.

320451563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62196.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 320451563 is about 17901.1609400061. The cubic root of 320451563 is about 684.3119615644.

The spelling of 320451563 in words is "three hundred twenty million, four hundred fifty-one thousand, five hundred sixty-three".