304421213 has 2 divisors, whose sum is σ = 304421214. Its totient is φ = 304421212.

The previous prime is 304421197. The next prime is 304421239. The reversal of 304421213 is 312124403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256576324 + 47844889 = 16018^2 + 6917^2 .

It is a cyclic number.

It is not a de Polignac number, because 304421213 - 2⁴ = 304421197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304421263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152210606 + 152210607.

It is an arithmetic number, because the mean of its divisors is an integer number (152210607).

Almost surely, 2^304421213 is an apocalyptic number.

It is an amenable number.

304421213 is a deficient number, since it is larger than the sum of its proper divisors (1).

304421213 is an equidigital number, since it uses as much as digits as its factorization.

304421213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 304421213 is about 17447.6707041370. The cubic root of 304421213 is about 672.7054879852.

Adding to 304421213 its reverse (312124403), we get a palindrome (616545616).

The spelling of 304421213 in words is "three hundred four million, four hundred twenty-one thousand, two hundred thirteen".