320421213 has 12 divisors (see below), whose sum is σ = 528949408. Its totient is φ = 183097800.

The previous prime is 320421181. The next prime is 320421229. The reversal of 320421213 is 312124023.

320421213 is a `hidden beast` number, since 32 + 0 + 421 + 213 = 666.

It is not a de Polignac number, because 320421213 - 2⁵ = 320421181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320421613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2542963 + ... + 2543088.

Almost surely, 2^320421213 is an apocalyptic number.

It is an amenable number.

320421213 is a deficient number, since it is larger than the sum of its proper divisors (208528195).

320421213 is a wasteful number, since it uses less digits than its factorization.

320421213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5086064 (or 5086061 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 320421213 is about 17900.3132095503. The cubic root of 320421213 is about 684.2903571306.

Adding to 320421213 its reverse (312124023), we get a palindrome (632545236).

The spelling of 320421213 in words is "three hundred twenty million, four hundred twenty-one thousand, two hundred thirteen".