320322213 has 6 divisors (see below), whose sum is σ = 462687654. Its totient is φ = 213548136.

The previous prime is 320322193. The next prime is 320322253. The reversal of 320322213 is 312223023.

It is a happy number.

320322213 is a `hidden beast` number, since 320 + 322 + 21 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 167107329 + 153214884 = 12927^2 + 12378^2 .

It is not a de Polignac number, because 320322213 - 2¹⁴ = 320305829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320322253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17795670 + ... + 17795687.

It is an arithmetic number, because the mean of its divisors is an integer number (77114609).

Almost surely, 2^320322213 is an apocalyptic number.

It is an amenable number.

320322213 is a deficient number, since it is larger than the sum of its proper divisors (142365441).

320322213 is a wasteful number, since it uses less digits than its factorization.

320322213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35591363 (or 35591360 counting only the distinct ones).

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

The square root of 320322213 is about 17897.5476811769. The cubic root of 320322213 is about 684.2198751932.

Adding to 320322213 its reverse (312223023), we get a palindrome (632545236).

The spelling of 320322213 in words is "three hundred twenty million, three hundred twenty-two thousand, two hundred thirteen".