44189521 has 4 divisors (see below), whose sum is σ = 44433844. Its totient is φ = 43945200.

The previous prime is 44189503. The next prime is 44189527. The reversal of 44189521 is 12598144.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7756225 + 36433296 = 2785^2 + 6036^2 .

It is a cyclic number.

It is not a de Polignac number, because 44189521 - 2⁹ = 44189009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44189527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121890 + ... + 122251.

It is an arithmetic number, because the mean of its divisors is an integer number (11108461).

Almost surely, 2^44189521 is an apocalyptic number.

It is an amenable number.

44189521 is a deficient number, since it is larger than the sum of its proper divisors (244323).

44189521 is a wasteful number, since it uses less digits than its factorization.

44189521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244322.

The product of its digits is 11520, while the sum is 34.

The square root of 44189521 is about 6647.5199134715. The cubic root of 44189521 is about 353.5409826267.

The spelling of 44189521 in words is "forty-four million, one hundred eighty-nine thousand, five hundred twenty-one".