444521225 has 18 divisors (see below), whose sum is σ = 555223950. Its totient is φ = 353041920.

The previous prime is 444521173. The next prime is 444521243. The reversal of 444521225 is 522125444.

It can be written as a sum of positive squares in 3 ways, for example, as 40551424 + 403969801 = 6368^2 + 20099^2 .

It is not a de Polignac number, because 444521225 - 2²⁰ = 443472649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 989801 + ... + 990249.

It is an arithmetic number, because the mean of its divisors is an integer number (30845775).

Almost surely, 2^444521225 is an apocalyptic number.

It is an amenable number.

444521225 is a deficient number, since it is larger than the sum of its proper divisors (110702725).

444521225 is an equidigital number, since it uses as much as digits as its factorization.

444521225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 653 counting only the distinct ones).

The product of its digits is 12800, while the sum is 29.

The square root of 444521225 is about 21083.6719999150. The cubic root of 444521225 is about 763.1867717362.

Adding to 444521225 its reverse (522125444), we get a palindrome (966646669).

The spelling of 444521225 in words is "four hundred forty-four million, five hundred twenty-one thousand, two hundred twenty-five".