320379521 has 16 divisors (see below), whose sum is σ = 402979968. Its totient is φ = 247430400.

The previous prime is 320379511. The next prime is 320379529. The reversal of 320379521 is 125973023.

It is not a de Polignac number, because 320379521 - 2²² = 316185217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320379529) 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 in 15 ways as a sum of consecutive naturals, for example, 9710 + ... + 27111.

It is an arithmetic number, because the mean of its divisors is an integer number (25186248).

Almost surely, 2^320379521 is an apocalyptic number.

It is an amenable number.

320379521 is a deficient number, since it is larger than the sum of its proper divisors (82600447).

320379521 is a wasteful number, since it uses less digits than its factorization.

320379521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36952.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 320379521 is about 17899.1486110373. The cubic root of 320379521 is about 684.2606767496.

The spelling of 320379521 in words is "three hundred twenty million, three hundred seventy-nine thousand, five hundred twenty-one".