320331213 has 16 divisors (see below), whose sum is σ = 475182400. Its totient is φ = 213276240.

The previous prime is 320331181. The next prime is 320331229. The reversal of 320331213 is 312133023.

320331213 is a `hidden beast` number, since 320 + 331 + 2 + 13 = 666.

It is not a de Polignac number, because 320331213 - 2⁵ = 320331181 is a prime.

It is a super-2 number, since 2×320331213² = 205224172044102738, 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 (320331233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14583 + ... + 29211.

It is an arithmetic number, because the mean of its divisors is an integer number (29698900).

Almost surely, 2^320331213 is an apocalyptic number.

It is an amenable number.

320331213 is a deficient number, since it is larger than the sum of its proper divisors (154851187).

320331213 is a wasteful number, since it uses less digits than its factorization.

320331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15449 (or 15443 counting only the distinct ones).

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

The square root of 320331213 is about 17897.7991105052. The cubic root of 320331213 is about 684.2262832421.

Adding to 320331213 its reverse (312133023), we get a palindrome (632464236).

The spelling of 320331213 in words is "three hundred twenty million, three hundred thirty-one thousand, two hundred thirteen".