44581 has 4 divisors (see below), whose sum is σ = 45100. Its totient is φ = 44064.

The previous prime is 44579. The next prime is 44587. The reversal of 44581 is 18544.

44581 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 36481 + 8100 = 191^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 44581 - 2¹ = 44579 is a prime.

It is a super-2 number, since 2×44581² = 3974931122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 6 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44587) 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, 96 + ... + 313.

It is an arithmetic number, because the mean of its divisors is an integer number (11275).

2⁴⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

44581 is a deficient number, since it is larger than the sum of its proper divisors (519).

44581 is a wasteful number, since it uses less digits than its factorization.

44581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its digits is 640, while the sum is 22.

The square root of 44581 is about 211.1421322238. The cubic root of 44581 is about 35.4581931975.

It can be divided in two parts, 44 and 581, that added together give a 4-th power (625 = 5⁴).

The spelling of 44581 in words is "forty-four thousand, five hundred eighty-one".