344221357 has 2 divisors, whose sum is σ = 344221358. Its totient is φ = 344221356.

The previous prime is 344221343. The next prime is 344221369. The reversal of 344221357 is 753122443.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214739716 + 129481641 = 14654^2 + 11379^2 .

It is an emirp because it is prime and its reverse (753122443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 344221357 - 2¹⁵ = 344188589 is a prime.

It is a super-2 number, since 2×344221357² = 236976685229842898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344221337) 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, 172110678 + 172110679.

It is an arithmetic number, because the mean of its divisors is an integer number (172110679).

Almost surely, 2^344221357 is an apocalyptic number.

It is an amenable number.

344221357 is a deficient number, since it is larger than the sum of its proper divisors (1).

344221357 is an equidigital number, since it uses as much as digits as its factorization.

344221357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 344221357 is about 18553.2034161220. The cubic root of 344221357 is about 700.8298708766.

The spelling of 344221357 in words is "three hundred forty-four million, two hundred twenty-one thousand, three hundred fifty-seven".