244464221 has 4 divisors (see below), whose sum is σ = 247211100. Its totient is φ = 241717344.

The previous prime is 244464197. The next prime is 244464239. The reversal of 244464221 is 122464442.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122464442 = 2 ⋅61232221.

It can be written as a sum of positive squares in 2 ways, for example, as 144264121 + 100200100 = 12011^2 + 10010^2 .

It is a cyclic number.

It is not a de Polignac number, because 244464221 - 2²² = 240269917 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 (244466221) 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, 1373306 + ... + 1373483.

It is an arithmetic number, because the mean of its divisors is an integer number (61802775).

Almost surely, 2^244464221 is an apocalyptic number.

It is an amenable number.

244464221 is a deficient number, since it is larger than the sum of its proper divisors (2746879).

244464221 is an equidigital number, since it uses as much as digits as its factorization.

244464221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746878.

The product of its digits is 12288, while the sum is 29.

The square root of 244464221 is about 15635.3516429916. The cubic root of 244464221 is about 625.2760133420.

The spelling of 244464221 in words is "two hundred forty-four million, four hundred sixty-four thousand, two hundred twenty-one".