444544221 has 8 divisors (see below), whose sum is σ = 646609824. Its totient is φ = 269420720.

The previous prime is 444544201. The next prime is 444544223. The reversal of 444544221 is 122445444.

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

It is a cyclic number.

It is not a de Polignac number, because 444544221 - 2¹⁸ = 444282077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444544223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6735486 + ... + 6735551.

It is an arithmetic number, because the mean of its divisors is an integer number (80826228).

Almost surely, 2^444544221 is an apocalyptic number.

It is an amenable number.

444544221 is a deficient number, since it is larger than the sum of its proper divisors (202065603).

444544221 is a wasteful number, since it uses less digits than its factorization.

444544221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13471051.

The product of its digits is 20480, while the sum is 30.

The square root of 444544221 is about 21084.2173437858. The cubic root of 444544221 is about 763.1999319180.

Adding to 444544221 its reverse (122445444), we get a palindrome (566989665).

The spelling of 444544221 in words is "four hundred forty-four million, five hundred forty-four thousand, two hundred twenty-one".