221334204 has 96 divisors (see below), whose sum is σ = 640170496. Its totient is φ = 57957120.

The previous prime is 221334187. The next prime is 221334209. The reversal of 221334204 is 402433122.

221334204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221334209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170799 + ... + 172089.

Almost surely, 2^221334204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221334204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320085248).

221334204 is an abundant number, since it is smaller than the sum of its proper divisors (418836292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221334204 is a wasteful number, since it uses less digits than its factorization.

221334204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1473 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 221334204 is about 14877.3049978818. The cubic root of 221334204 is about 604.8989690821.

Adding to 221334204 its reverse (402433122), we get a palindrome (623767326).

The spelling of 221334204 in words is "two hundred twenty-one million, three hundred thirty-four thousand, two hundred four".