344213221 has 4 divisors (see below), whose sum is σ = 375505344. Its totient is φ = 312921100.

The previous prime is 344213167. The next prime is 344213227. The reversal of 344213221 is 122312443.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 344213221 - 2⁹ = 344212709 is a prime.

It is a super-2 number, since 2×344213221² = 236965483022389682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 344213192 and 344213201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344213227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15646045 + ... + 15646066.

It is an arithmetic number, because the mean of its divisors is an integer number (93876336).

Almost surely, 2^344213221 is an apocalyptic number.

It is an amenable number.

344213221 is a deficient number, since it is larger than the sum of its proper divisors (31292123).

344213221 is a wasteful number, since it uses less digits than its factorization.

344213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31292122.

The product of its digits is 1152, while the sum is 22.

The square root of 344213221 is about 18552.9841534994. The cubic root of 344213221 is about 700.8243492390.

Adding to 344213221 its reverse (122312443), we get a palindrome (466525664).

The spelling of 344213221 in words is "three hundred forty-four million, two hundred thirteen thousand, two hundred twenty-one".