306622241 has 2 divisors, whose sum is σ = 306622242. Its totient is φ = 306622240.

The previous prime is 306622237. The next prime is 306622243. The reversal of 306622241 is 142226603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259081216 + 47541025 = 16096^2 + 6895^2 .

It is an emirp because it is prime and its reverse (142226603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 306622241 - 2² = 306622237 is a prime.

Together with 306622243, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 306622241.

It is not a weakly prime, because it can be changed into another prime (306622243) 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, 153311120 + 153311121.

It is an arithmetic number, because the mean of its divisors is an integer number (153311121).

Almost surely, 2^306622241 is an apocalyptic number.

It is an amenable number.

306622241 is a deficient number, since it is larger than the sum of its proper divisors (1).

306622241 is an equidigital number, since it uses as much as digits as its factorization.

306622241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 306622241 is about 17510.6322273069. The cubic root of 306622241 is about 674.3228626008.

Adding to 306622241 its reverse (142226603), we get a palindrome (448848844).

The spelling of 306622241 in words is "three hundred six million, six hundred twenty-two thousand, two hundred forty-one".