320012213 has 2 divisors, whose sum is σ = 320012214. Its totient is φ = 320012212.

The previous prime is 320012201. The next prime is 320012239. The reversal of 320012213 is 312210023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319086769 + 925444 = 17863^2 + 962^2 .

It is an emirp because it is prime and its reverse (312210023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320012213 - 2¹⁰ = 320011189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320012263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160006106 + 160006107.

It is an arithmetic number, because the mean of its divisors is an integer number (160006107).

Almost surely, 2^320012213 is an apocalyptic number.

It is an amenable number.

320012213 is a deficient number, since it is larger than the sum of its proper divisors (1).

320012213 is an equidigital number, since it uses as much as digits as its factorization.

320012213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 320012213 is about 17888.8851804689. The cubic root of 320012213 is about 683.9990802001. Note that the first 3 decimals are identical.

Adding to 320012213 its reverse (312210023), we get a palindrome (632222236).

The spelling of 320012213 in words is "three hundred twenty million, twelve thousand, two hundred thirteen".