204002221 has 4 divisors (see below), whose sum is σ = 214739200. Its totient is φ = 193265244.

The previous prime is 204002219. The next prime is 204002233. The reversal of 204002221 is 122200402.

204002221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204002221 - 2¹ = 204002219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204002291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368461 + ... + 5368498.

It is an arithmetic number, because the mean of its divisors is an integer number (53684800).

Almost surely, 2^204002221 is an apocalyptic number.

It is an amenable number.

204002221 is a deficient number, since it is larger than the sum of its proper divisors (10736979).

204002221 is a wasteful number, since it uses less digits than its factorization.

204002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10736978.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 204002221 is about 14282.9346074257. The cubic root of 204002221 is about 588.6786680377.

Adding to 204002221 its reverse (122200402), we get a palindrome (326202623).

The spelling of 204002221 in words is "two hundred four million, two thousand, two hundred twenty-one".