44372521 has 4 divisors (see below), whose sum is σ = 44414212. Its totient is φ = 44330832.

The previous prime is 44372513. The next prime is 44372527. The reversal of 44372521 is 12527344.

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 43626025 + 746496 = 6605^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 44372521 - 2³ = 44372513 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 44372521.

It is not an unprimeable number, because it can be changed into a prime (44372527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19206 + ... + 21391.

It is an arithmetic number, because the mean of its divisors is an integer number (11103553).

Almost surely, 2^44372521 is an apocalyptic number.

It is an amenable number.

44372521 is a deficient number, since it is larger than the sum of its proper divisors (41691).

44372521 is a wasteful number, since it uses less digits than its factorization.

44372521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41690.

The product of its digits is 6720, while the sum is 28.

The square root of 44372521 is about 6661.2702242140. The cubic root of 44372521 is about 354.0283447358.

Adding to 44372521 its reverse (12527344), we get a palindrome (56899865).

The spelling of 44372521 in words is "forty-four million, three hundred seventy-two thousand, five hundred twenty-one".