204421212 has 96 divisors (see below), whose sum is σ = 548674560. Its totient is φ = 65782080.

The previous prime is 204421199. The next prime is 204421237. The reversal of 204421212 is 212124402.

204421212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×204421212³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406153 + ... + 406655.

It is an arithmetic number, because the mean of its divisors is an integer number (5715360).

Almost surely, 2^204421212 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 204421212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274337280).

204421212 is an abundant number, since it is smaller than the sum of its proper divisors (344253348).

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

204421212 is a wasteful number, since it uses less digits than its factorization.

204421212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 204421212 is about 14297.5946228728. The cubic root of 204421212 is about 589.0814126633.

Adding to 204421212 its reverse (212124402), we get a palindrome (416545614).

The spelling of 204421212 in words is "two hundred four million, four hundred twenty-one thousand, two hundred twelve".