444444332221 has 16 divisors (see below), whose sum is σ = 471321345600. Its totient is φ = 417917380608.

The previous prime is 444444332219. The next prime is 444444332239. The reversal of 444444332221 is 122233444444.

It is a cyclic number.

It is not a de Polignac number, because 444444332221 - 2¹ = 444444332219 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 (444444332261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11593341 + ... + 11631613.

It is an arithmetic number, because the mean of its divisors is an integer number (29457584100).

Almost surely, 2^444444332221 is an apocalyptic number.

It is an amenable number.

444444332221 is a deficient number, since it is larger than the sum of its proper divisors (26877013379).

444444332221 is a wasteful number, since it uses less digits than its factorization.

444444332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42828.

The product of its digits is 294912, while the sum is 37.

Adding to 444444332221 its reverse (122233444444), we get a palindrome (566677776665).

The spelling of 444444332221 in words is "four hundred forty-four billion, four hundred forty-four million, three hundred thirty-two thousand, two hundred twenty-one".