344606221 has 2 divisors, whose sum is σ = 344606222. Its totient is φ = 344606220.

The previous prime is 344606219. The next prime is 344606231. The reversal of 344606221 is 122606443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330730596 + 13875625 = 18186^2 + 3725^2 .

It is a cyclic number.

It is not a de Polignac number, because 344606221 - 2¹ = 344606219 is a prime.

Together with 344606219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 344606221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344606231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172303110 + 172303111.

It is an arithmetic number, because the mean of its divisors is an integer number (172303111).

Almost surely, 2^344606221 is an apocalyptic number.

It is an amenable number.

344606221 is a deficient number, since it is larger than the sum of its proper divisors (1).

344606221 is an equidigital number, since it uses as much as digits as its factorization.

344606221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 344606221 is about 18563.5724201997. The cubic root of 344606221 is about 701.0909661677.

The spelling of 344606221 in words is "three hundred forty-four million, six hundred six thousand, two hundred twenty-one".