4221544444 has 12 divisors (see below), whose sum is σ = 7955987704. Its totient is φ = 1948405104.

The previous prime is 4221544433. The next prime is 4221544477. The reversal of 4221544444 is 4444451224.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40591722 + ... + 40591825.

Almost surely, 2^4221544444 is an apocalyptic number.

It is an amenable number.

4221544444 is a deficient number, since it is larger than the sum of its proper divisors (3734443260).

4221544444 is a wasteful number, since it uses less digits than its factorization.

4221544444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81183564 (or 81183562 counting only the distinct ones).

The product of its digits is 81920, while the sum is 34.

The square root of 4221544444 is about 64973.4133626978. The cubic root of 4221544444 is about 1616.1827060154.

Adding to 4221544444 its reverse (4444451224), we get a palindrome (8665995668).

The spelling of 4221544444 in words is "four billion, two hundred twenty-one million, five hundred forty-four thousand, four hundred forty-four".