244251221 has 4 divisors (see below), whose sum is σ = 244703244. Its totient is φ = 243799200.

The previous prime is 244251179. The next prime is 244251239. The reversal of 244251221 is 122152442.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122152442 = 2 ⋅61076221.

It can be written as a sum of positive squares in 2 ways, for example, as 108784900 + 135466321 = 10430^2 + 11639^2 .

It is a cyclic number.

It is not a de Polignac number, because 244251221 - 2¹⁰ = 244250197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244251281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225200 + ... + 226281.

It is an arithmetic number, because the mean of its divisors is an integer number (61175811).

Almost surely, 2^244251221 is an apocalyptic number.

It is an amenable number.

244251221 is a deficient number, since it is larger than the sum of its proper divisors (452023).

244251221 is an equidigital number, since it uses as much as digits as its factorization.

244251221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452022.

The product of its digits is 1280, while the sum is 23.

The square root of 244251221 is about 15628.5386712898. The cubic root of 244251221 is about 625.0943610062.

The spelling of 244251221 in words is "two hundred forty-four million, two hundred fifty-one thousand, two hundred twenty-one".