344156221 has 4 divisors (see below), whose sum is σ = 344197372. Its totient is φ = 344115072.

The previous prime is 344156213. The next prime is 344156233. The reversal of 344156221 is 122651443.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 192127321 + 152028900 = 13861^2 + 12330^2 .

It is a cyclic number.

It is not a de Polignac number, because 344156221 - 2³ = 344156213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 344156221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344156201) 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 in 3 ways as a sum of consecutive naturals, for example, 3060 + ... + 26413.

It is an arithmetic number, because the mean of its divisors is an integer number (86049343).

Almost surely, 2^344156221 is an apocalyptic number.

It is an amenable number.

344156221 is a deficient number, since it is larger than the sum of its proper divisors (41151).

344156221 is a wasteful number, since it uses less digits than its factorization.

344156221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41150.

The product of its digits is 5760, while the sum is 28.

The square root of 344156221 is about 18551.4479488799. The cubic root of 344156221 is about 700.7856627595.

The spelling of 344156221 in words is "three hundred forty-four million, one hundred fifty-six thousand, two hundred twenty-one".