320213331 has 20 divisors (see below), whose sum is σ = 494841600. Its totient is φ = 206112816.

The previous prime is 320213323. The next prime is 320213351. The reversal of 320213331 is 133312023.

320213331 is a `hidden beast` number, since 320 + 2 + 13 + 331 = 666.

It is not a de Polignac number, because 320213331 - 2³ = 320213323 is a prime.

It is a super-2 number, since 2×320213331² = 205073154700231122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320213351) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 65811 + ... + 70508.

It is an arithmetic number, because the mean of its divisors is an integer number (24742080).

Almost surely, 2^320213331 is an apocalyptic number.

320213331 is a deficient number, since it is larger than the sum of its proper divisors (174628269).

320213331 is a wasteful number, since it uses less digits than its factorization.

320213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136360 (or 136351 counting only the distinct ones).

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

The square root of 320213331 is about 17894.5056092645. The cubic root of 320213331 is about 684.1423411061.

Adding to 320213331 its reverse (133312023), we get a palindrome (453525354).

The spelling of 320213331 in words is "three hundred twenty million, two hundred thirteen thousand, three hundred thirty-one".