344427221 has 8 divisors (see below), whose sum is σ = 347768280. Its totient is φ = 341102592.

The previous prime is 344427211. The next prime is 344427263. The reversal of 344427221 is 122724443.

It can be written as a sum of positive squares in 4 ways, for example, as 187827025 + 156600196 = 13705^2 + 12514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344427221 is a prime.

It is a super-2 number, since 2×344427221² = 237260221131565682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344427211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40301 + ... + 48093.

It is an arithmetic number, because the mean of its divisors is an integer number (43471035).

Almost surely, 2^344427221 is an apocalyptic number.

It is an amenable number.

344427221 is a deficient number, since it is larger than the sum of its proper divisors (3341059).

344427221 is a wasteful number, since it uses less digits than its factorization.

344427221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8215.

The product of its digits is 10752, while the sum is 29.

The square root of 344427221 is about 18558.7505236748. The cubic root of 344427221 is about 700.9695551093.

The spelling of 344427221 in words is "three hundred forty-four million, four hundred twenty-seven thousand, two hundred twenty-one".