320999331 has 8 divisors (see below), whose sum is σ = 437105664. Its totient is φ = 209446280.

The previous prime is 320999303. The next prime is 320999333. The reversal of 320999331 is 133999023.

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

It is a cyclic number.

It is not a de Polignac number, because 320999331 - 2²³ = 312610723 is a prime.

It is a super-2 number, since 2×320999331² = 206081141004895122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320999331.

It is not an unprimeable number, because it can be changed into a prime (320999333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138155 + ... + 1138436.

It is an arithmetic number, because the mean of its divisors is an integer number (54638208).

Almost surely, 2^320999331 is an apocalyptic number.

320999331 is a deficient number, since it is larger than the sum of its proper divisors (116106333).

320999331 is a wasteful number, since it uses less digits than its factorization.

320999331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276641.

The product of its (nonzero) digits is 39366, while the sum is 39.

The square root of 320999331 is about 17916.4541971898. The cubic root of 320999331 is about 684.7016520916.

The spelling of 320999331 in words is "three hundred twenty million, nine hundred ninety-nine thousand, three hundred thirty-one".