320223213 has 24 divisors (see below), whose sum is σ = 485485728. Its totient is φ = 210896784.

The previous prime is 320223139. The next prime is 320223229. The reversal of 320223213 is 312322023.

It is a happy number.

320223213 is a `hidden beast` number, since 320 + 22 + 321 + 3 = 666.

It is not a de Polignac number, because 320223213 - 2⁸ = 320222957 is a prime.

It is a super-2 number, since 2×320223213² = 205085812288086738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320223413) 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 23 ways as a sum of consecutive naturals, for example, 12231 + ... + 28107.

It is an arithmetic number, because the mean of its divisors is an integer number (20228572).

Almost surely, 2^320223213 is an apocalyptic number.

It is an amenable number.

320223213 is a deficient number, since it is larger than the sum of its proper divisors (165262515).

320223213 is an equidigital number, since it uses as much as digits as its factorization.

320223213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15975 (or 15963 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 320223213 is about 17894.7817254081. The cubic root of 320223213 is about 684.1493787322.

Adding to 320223213 its reverse (312322023), we get a palindrome (632545236).

The spelling of 320223213 in words is "three hundred twenty million, two hundred twenty-three thousand, two hundred thirteen".