321324213 has 24 divisors (see below), whose sum is σ = 507796128. Its totient is φ = 180145056.

The previous prime is 321324209. The next prime is 321324221. The reversal of 321324213 is 312423123.

It is not a de Polignac number, because 321324213 - 2² = 321324209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 321324213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321324233) 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 23 ways as a sum of consecutive naturals, for example, 12831 + ... + 28412.

It is an arithmetic number, because the mean of its divisors is an integer number (21158172).

Almost surely, 2^321324213 is an apocalyptic number.

It is an amenable number.

321324213 is a deficient number, since it is larger than the sum of its proper divisors (186471915).

321324213 is a wasteful number, since it uses less digits than its factorization.

321324213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41313 (or 41306 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 321324213 is about 17925.5184862252. The cubic root of 321324213 is about 684.9325687082.

Adding to 321324213 its reverse (312423123), we get a palindrome (633747336).

The spelling of 321324213 in words is "three hundred twenty-one million, three hundred twenty-four thousand, two hundred thirteen".