320331311 has 8 divisors (see below), whose sum is σ = 335198304. Its totient is φ = 305791200.

The previous prime is 320331307. The next prime is 320331337. The reversal of 320331311 is 113133023.

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 320331311 - 2² = 320331307 is a prime.

It is a super-2 number, since 2×320331311² = 205224297613957442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320331311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320331301) 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, 79715 + ... + 83636.

It is an arithmetic number, because the mean of its divisors is an integer number (41899788).

Almost surely, 2^320331311 is an apocalyptic number.

320331311 is a deficient number, since it is larger than the sum of its proper divisors (14866993).

320331311 is a wasteful number, since it uses less digits than its factorization.

320331311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163441.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 320331311 is about 17897.8018482718. The cubic root of 320331311 is about 684.2263530180.

Adding to 320331311 its reverse (113133023), we get a palindrome (433464334).

The spelling of 320331311 in words is "three hundred twenty million, three hundred thirty-one thousand, three hundred eleven".