320313231 has 16 divisors (see below), whose sum is σ = 542329600. Its totient is φ = 183036024.

The previous prime is 320313221. The next prime is 320313233. The reversal of 320313231 is 132313023.

320313231 is a `hidden beast` number, since 320 + 313 + 2 + 31 = 666.

It is not a de Polignac number, because 320313231 - 2²¹ = 318216079 is a prime.

It is a super-2 number, since 2×320313231² = 205201131907318722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320313233) 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 15 ways as a sum of consecutive naturals, for example, 847201 + ... + 847578.

It is an arithmetic number, because the mean of its divisors is an integer number (33895600).

Almost surely, 2^320313231 is an apocalyptic number.

320313231 is a deficient number, since it is larger than the sum of its proper divisors (222016369).

320313231 is a wasteful number, since it uses less digits than its factorization.

320313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694795 (or 1694789 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 320313231 is about 17897.2967511856. The cubic root of 320313231 is about 684.2134798408.

Adding to 320313231 its reverse (132313023), we get a palindrome (452626254).

The spelling of 320313231 in words is "three hundred twenty million, three hundred thirteen thousand, two hundred thirty-one".