44181 has 6 divisors (see below), whose sum is σ = 63830. Its totient is φ = 29448.

The previous prime is 44179. The next prime is 44189. The reversal of 44181 is 18144.

44181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44100 + 81 = 210^2 + 9^2 .

It is not a de Polignac number, because 44181 - 2¹ = 44179 is a prime.

It is a super-2 number, since 2×44181² = 3903921522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 44181.

It is not an unprimeable number, because it can be changed into a prime (44189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2446 + ... + 2463.

2⁴⁴¹⁸¹ is an apocalyptic number.

It is an amenable number.

44181 is a deficient number, since it is larger than the sum of its proper divisors (19649).

44181 is a wasteful number, since it uses less digits than its factorization.

44181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4915 (or 4912 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 44181 is about 210.1927686672. The cubic root of 44181 is about 35.3518256904.

It can be divided in two parts, 441 and 81, that multiplied together give a square (35721 = 189²).

The spelling of 44181 in words is "forty-four thousand, one hundred eighty-one".