304010221 has 2 divisors, whose sum is σ = 304010222. Its totient is φ = 304010220.

The previous prime is 304010209. The next prime is 304010233. The reversal of 304010221 is 122010403.

It is a balanced prime because it is at equal distance from previous prime (304010209) and next prime (304010233).

It can be written as a sum of positive squares in only one way, i.e., 249987721 + 54022500 = 15811^2 + 7350^2 .

It is an emirp because it is prime and its reverse (122010403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304010221 - 2¹³ = 304002029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304010321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152005110 + 152005111.

It is an arithmetic number, because the mean of its divisors is an integer number (152005111).

Almost surely, 2^304010221 is an apocalyptic number.

It is an amenable number.

304010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

304010221 is an equidigital number, since it uses as much as digits as its factorization.

304010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 304010221 is about 17435.8888789760. Note that the first 4 decimals coincide. The cubic root of 304010221 is about 672.4026169663.

Adding to 304010221 its reverse (122010403), we get a palindrome (426020624).

The spelling of 304010221 in words is "three hundred four million, ten thousand, two hundred twenty-one".