320340213 has 12 divisors (see below), whose sum is σ = 462877740. Its totient is φ = 213484416.

The previous prime is 320340193. The next prime is 320340217. The reversal of 320340213 is 312043023.

320340213 is a `hidden beast` number, since 320 + 340 + 2 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 124144164 + 196196049 = 11142^2 + 14007^2 .

It is not a de Polignac number, because 320340213 - 2⁶ = 320340149 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 (320340217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34093 + ... + 42461.

It is an arithmetic number, because the mean of its divisors is an integer number (38573145).

Almost surely, 2^320340213 is an apocalyptic number.

It is an amenable number.

320340213 is a deficient number, since it is larger than the sum of its proper divisors (142537527).

320340213 is a wasteful number, since it uses less digits than its factorization.

320340213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12628 (or 12625 counting only the distinct ones).

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

The square root of 320340213 is about 17898.0505363014. The cubic root of 320340213 is about 684.2326911710.

Adding to 320340213 its reverse (312043023), we get a palindrome (632383236).

The spelling of 320340213 in words is "three hundred twenty million, three hundred forty thousand, two hundred thirteen".