2444444221 has 8 divisors (see below), whose sum is σ = 2573681600. Its totient is φ = 2315265120.

The previous prime is 2444444153. The next prime is 2444444273. The reversal of 2444444221 is 1224444442.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2444444221 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 (2444444621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91345 + ... + 115033.

It is an arithmetic number, because the mean of its divisors is an integer number (321710200).

Almost surely, 2^2444444221 is an apocalyptic number.

It is an amenable number.

2444444221 is a deficient number, since it is larger than the sum of its proper divisors (129237379).

2444444221 is a wasteful number, since it uses less digits than its factorization.

2444444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29139.

The product of its digits is 32768, while the sum is 31.

The square root of 2444444221 is about 49441.3209876112. The cubic root of 2444444221 is about 1347.0799658289.

Adding to 2444444221 its reverse (1224444442), we get a palindrome (3668888663).

The spelling of 2444444221 in words is "two billion, four hundred forty-four million, four hundred forty-four thousand, two hundred twenty-one".