304342221 has 16 divisors (see below), whose sum is σ = 429101568. Its totient is φ = 191558400.

The previous prime is 304342219. The next prime is 304342223. The reversal of 304342221 is 122243403.

It is an interprime number because it is at equal distance from previous prime (304342219) and next prime (304342223).

It is not a de Polignac number, because 304342221 - 2¹ = 304342219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304342223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36096 + ... + 43721.

It is an arithmetic number, because the mean of its divisors is an integer number (26818848).

Almost surely, 2^304342221 is an apocalyptic number.

304342221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

304342221 is a deficient number, since it is larger than the sum of its proper divisors (124759347).

304342221 is a wasteful number, since it uses less digits than its factorization.

304342221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79892.

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

The square root of 304342221 is about 17445.4068740170. The cubic root of 304342221 is about 672.6472978345.

Adding to 304342221 its reverse (122243403), we get a palindrome (426585624).

The spelling of 304342221 in words is "three hundred four million, three hundred forty-two thousand, two hundred twenty-one".