320423213 has 16 divisors (see below), whose sum is σ = 361210752. Its totient is φ = 281736000.

The previous prime is 320423209. The next prime is 320423251. The reversal of 320423213 is 312324023.

It is a cyclic number.

It is not a de Polignac number, because 320423213 - 2² = 320423209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320423273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37523 + ... + 45263.

It is an arithmetic number, because the mean of its divisors is an integer number (22575672).

Almost surely, 2^320423213 is an apocalyptic number.

It is an amenable number.

320423213 is a deficient number, since it is larger than the sum of its proper divisors (40787539).

320423213 is a wasteful number, since it uses less digits than its factorization.

320423213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 320423213 is about 17900.3690744074. The cubic root of 320423213 is about 684.2917808585.

Adding to 320423213 its reverse (312324023), we get a palindrome (632747236).

The spelling of 320423213 in words is "three hundred twenty million, four hundred twenty-three thousand, two hundred thirteen".