320351331 has 8 divisors (see below), whose sum is σ = 428678224. Its totient is φ = 212796000.

The previous prime is 320351323. The next prime is 320351351. The reversal of 320351331 is 133153023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320351331 - 2³ = 320351323 is a prime.

It is a super-2 number, since 2×320351331² = 205249950546943122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320351298 and 320351307.

It is not an unprimeable number, because it can be changed into a prime (320351351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191920 + ... + 193581.

It is an arithmetic number, because the mean of its divisors is an integer number (53584778).

Almost surely, 2^320351331 is an apocalyptic number.

320351331 is a deficient number, since it is larger than the sum of its proper divisors (108326893).

320351331 is a wasteful number, since it uses less digits than its factorization.

320351331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385781.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 320351331 is about 17898.3611260920. The cubic root of 320351331 is about 684.2406069334.

The spelling of 320351331 in words is "three hundred twenty million, three hundred fifty-one thousand, three hundred thirty-one".