344216621 has 16 divisors (see below), whose sum is σ = 402230400. Its totient is φ = 294446880.

The previous prime is 344216581. The next prime is 344216633. The reversal of 344216621 is 126612443.

It is not a de Polignac number, because 344216621 - 2⁶ = 344216557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344216641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293366 + ... + 294536.

It is an arithmetic number, because the mean of its divisors is an integer number (25139400).

Almost surely, 2^344216621 is an apocalyptic number.

It is an amenable number.

344216621 is a deficient number, since it is larger than the sum of its proper divisors (58013779).

344216621 is an equidigital number, since it uses as much as digits as its factorization.

344216621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049 (or 2035 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 344216621 is about 18553.0757827375. The cubic root of 344216621 is about 700.8266567186.

The spelling of 344216621 in words is "three hundred forty-four million, two hundred sixteen thousand, six hundred twenty-one".