44521621 has 4 divisors (see below), whose sum is σ = 44535744. Its totient is φ = 44507500.

The previous prime is 44521597. The next prime is 44521639. The reversal of 44521621 is 12612544.

It is a happy number.

44521621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 44521621 - 2⁹ = 44521109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44521651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66 + ... + 9436.

It is an arithmetic number, because the mean of its divisors is an integer number (11133936).

Almost surely, 2^44521621 is an apocalyptic number.

It is an amenable number.

44521621 is a deficient number, since it is larger than the sum of its proper divisors (14123).

44521621 is an equidigital number, since it uses as much as digits as its factorization.

44521621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14122.

The product of its digits is 1920, while the sum is 25.

The square root of 44521621 is about 6672.4523977320. The cubic root of 44521621 is about 354.4244353187.

The spelling of 44521621 in words is "forty-four million, five hundred twenty-one thousand, six hundred twenty-one".