44291521 has 4 divisors (see below), whose sum is σ = 45371844. Its totient is φ = 43211200.

The previous prime is 44291519. The next prime is 44291543. The reversal of 44291521 is 12519244.

44291521 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.

It can be written as a sum of positive squares in 2 ways, for example, as 929296 + 43362225 = 964^2 + 6585^2 .

It is a cyclic number.

It is not a de Polignac number, because 44291521 - 2¹ = 44291519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44291521.

It is not an unprimeable number, because it can be changed into a prime (44291561) 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, 540100 + ... + 540181.

It is an arithmetic number, because the mean of its divisors is an integer number (11342961).

Almost surely, 2^44291521 is an apocalyptic number.

44291521 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

44291521 is a deficient number, since it is larger than the sum of its proper divisors (1080323).

44291521 is a wasteful number, since it uses less digits than its factorization.

44291521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080322.

The product of its digits is 2880, while the sum is 28.

The square root of 44291521 is about 6655.1875255322. The cubic root of 44291521 is about 353.8127926923.

The spelling of 44291521 in words is "forty-four million, two hundred ninety-one thousand, five hundred twenty-one".