444553221 has 36 divisors (see below), whose sum is σ = 700076832. Its totient is φ = 245803824.

The previous prime is 444553189. The next prime is 444553243. The reversal of 444553221 is 122355444.

It is not a de Polignac number, because 444553221 - 2⁵ = 444553189 is a prime.

Its product of digits (19200) is a multiple of the sum of its prime divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444551221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4154650 + ... + 4154756.

Almost surely, 2^444553221 is an apocalyptic number.

It is an amenable number.

444553221 is a deficient number, since it is larger than the sum of its proper divisors (255523611).

444553221 is an equidigital number, since it uses as much as digits as its factorization.

444553221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 160 counting only the distinct ones).

The product of its digits is 19200, while the sum is 30.

The square root of 444553221 is about 21084.4307724918. The cubic root of 444553221 is about 763.2050823265.

The spelling of 444553221 in words is "four hundred forty-four million, five hundred fifty-three thousand, two hundred twenty-one".