213221323 has 8 divisors (see below), whose sum is σ = 243777248. Its totient is φ = 182689344.

The previous prime is 213221251. The next prime is 213221377. The reversal of 213221323 is 323122312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213221323 - 2²⁵ = 179666891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213221323.

It is not an unprimeable number, because it can be changed into a prime (213221383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21565 + ... + 29857.

It is an arithmetic number, because the mean of its divisors is an integer number (30472156).

Almost surely, 2^213221323 is an apocalyptic number.

213221323 is a deficient number, since it is larger than the sum of its proper divisors (30555925).

213221323 is an equidigital number, since it uses as much as digits as its factorization.

213221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11973.

The product of its digits is 432, while the sum is 19.

The square root of 213221323 is about 14602.0999517193. The cubic root of 213221323 is about 597.4160388083.

Adding to 213221323 its reverse (323122312), we get a palindrome (536343635).

The spelling of 213221323 in words is "two hundred thirteen million, two hundred twenty-one thousand, three hundred twenty-three".