213324221 has 16 divisors (see below), whose sum is σ = 236711808. Its totient is φ = 190632000.

The previous prime is 213324187. The next prime is 213324233. The reversal of 213324221 is 122423312.

It is a cyclic number.

It is not a de Polignac number, because 213324221 - 2⁶ = 213324157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213324193 and 213324202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213324121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173816 + ... + 175038.

It is an arithmetic number, because the mean of its divisors is an integer number (14794488).

Almost surely, 2^213324221 is an apocalyptic number.

It is an amenable number.

213324221 is a deficient number, since it is larger than the sum of its proper divisors (23387587).

213324221 is a wasteful number, since it uses less digits than its factorization.

213324221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its digits is 576, while the sum is 20.

The square root of 213324221 is about 14605.6229240659. The cubic root of 213324221 is about 597.5121252419.

Adding to 213324221 its reverse (122423312), we get a palindrome (335747533).

Subtracting from 213324221 its reverse (122423312), we obtain a palindrome (90900909).

The spelling of 213324221 in words is "two hundred thirteen million, three hundred twenty-four thousand, two hundred twenty-one".