304204340221 has 2 divisors, whose sum is σ = 304204340222. Its totient is φ = 304204340220.

The previous prime is 304204340213. The next prime is 304204340257. The reversal of 304204340221 is 122043402403.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228861776025 + 75342564196 = 478395^2 + 274486^2 .

It is a cyclic number.

It is not a de Polignac number, because 304204340221 - 2³ = 304204340213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304204346221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152102170110 + 152102170111.

It is an arithmetic number, because the mean of its divisors is an integer number (152102170111).

Almost surely, 2^304204340221 is an apocalyptic number.

It is an amenable number.

304204340221 is a deficient number, since it is larger than the sum of its proper divisors (1).

304204340221 is an equidigital number, since it uses as much as digits as its factorization.

304204340221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 304204340221 its reverse (122043402403), we get a palindrome (426247742624).

The spelling of 304204340221 in words is "three hundred four billion, two hundred four million, three hundred forty thousand, two hundred twenty-one".