344228321 has 2 divisors, whose sum is σ = 344228322. Its totient is φ = 344228320.

The previous prime is 344228233. The next prime is 344228351. The reversal of 344228321 is 123822443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231040000 + 113188321 = 15200^2 + 10639^2 .

It is an emirp because it is prime and its reverse (123822443) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344228321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (344228351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172114160 + 172114161.

It is an arithmetic number, because the mean of its divisors is an integer number (172114161).

Almost surely, 2^344228321 is an apocalyptic number.

It is an amenable number.

344228321 is a deficient number, since it is larger than the sum of its proper divisors (1).

344228321 is an equidigital number, since it uses as much as digits as its factorization.

344228321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 29.

The square root of 344228321 is about 18553.3910916576. The cubic root of 344228321 is about 700.8345970469.

The spelling of 344228321 in words is "three hundred forty-four million, two hundred twenty-eight thousand, three hundred twenty-one".