204030221 has 4 divisors (see below), whose sum is σ = 204070944. Its totient is φ = 203989500.

The previous prime is 204030193. The next prime is 204030223. The reversal of 204030221 is 122030402.

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 204030221 - 2⁶ = 204030157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204030196 and 204030205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204030223) 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, 11585 + ... + 23286.

It is an arithmetic number, because the mean of its divisors is an integer number (51017736).

Almost surely, 2^204030221 is an apocalyptic number.

It is an amenable number.

204030221 is a deficient number, since it is larger than the sum of its proper divisors (40723).

204030221 is an equidigital number, since it uses as much as digits as its factorization.

204030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40722.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 204030221 is about 14283.9147645175. The cubic root of 204030221 is about 588.7055995234.

Adding to 204030221 its reverse (122030402), we get a palindrome (326060623).

The spelling of 204030221 in words is "two hundred four million, thirty thousand, two hundred twenty-one".