2044181 has 4 divisors (see below), whose sum is σ = 2114700. Its totient is φ = 1973664.

The previous prime is 2044169. The next prime is 2044187. The reversal of 2044181 is 1814402.

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 504100 + 1540081 = 710^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 2044181 - 2¹⁴ = 2027797 is a prime.

It is a super-2 number, since 2×2044181² = 8357351921522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2044187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35216 + ... + 35273.

It is an arithmetic number, because the mean of its divisors is an integer number (528675).

2^2044181 is an apocalyptic number.

It is an amenable number.

2044181 is a deficient number, since it is larger than the sum of its proper divisors (70519).

2044181 is an equidigital number, since it uses as much as digits as its factorization.

2044181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70518.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 2044181 is about 1429.7485792964. The cubic root of 2044181 is about 126.9130990437.

Adding to 2044181 its reverse (1814402), we get a palindrome (3858583).

The spelling of 2044181 in words is "two million, forty-four thousand, one hundred eighty-one".