304030221 has 24 divisors (see below), whose sum is σ = 455089824. Its totient is φ = 178921440.

The previous prime is 304030217. The next prime is 304030231. The reversal of 304030221 is 122030403.

It is not a de Polignac number, because 304030221 - 2² = 304030217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 304030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304030201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 609030 + ... + 609528.

It is an arithmetic number, because the mean of its divisors is an integer number (18962076).

Almost surely, 2^304030221 is an apocalyptic number.

It is an amenable number.

304030221 is a deficient number, since it is larger than the sum of its proper divisors (151059603).

304030221 is an equidigital number, since it uses as much as digits as its factorization.

304030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 304030221 is about 17436.4623992368. The cubic root of 304030221 is about 672.4173618186.

Adding to 304030221 its reverse (122030403), we get a palindrome (426060624).

The spelling of 304030221 in words is "three hundred four million, thirty thousand, two hundred twenty-one".