4444422221 has 4 divisors (see below), whose sum is σ = 4678339200. Its totient is φ = 4210505244.

The previous prime is 4444422187. The next prime is 4444422223. The reversal of 4444422221 is 1222244444.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4444422221 - 2¹⁴ = 4444405837 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4444422223) 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 3 ways as a sum of consecutive naturals, for example, 116958461 + ... + 116958498.

It is an arithmetic number, because the mean of its divisors is an integer number (1169584800).

Almost surely, 2^4444422221 is an apocalyptic number.

It is an amenable number.

4444422221 is a deficient number, since it is larger than the sum of its proper divisors (233916979).

4444422221 is a wasteful number, since it uses less digits than its factorization.

4444422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233916978.

The product of its digits is 16384, while the sum is 29.

The square root of 4444422221 is about 66666.4999906250. The cubic root of 4444422221 is about 1644.1386424961.

Adding to 4444422221 its reverse (1222244444), we get a palindrome (5666666665).

The spelling of 4444422221 in words is "four billion, four hundred forty-four million, four hundred twenty-two thousand, two hundred twenty-one".