45044181 has 84 divisors (see below), whose sum is σ = 85476972. Its totient is φ = 23514624.

The previous prime is 45044179. The next prime is 45044191. The reversal of 45044181 is 18144054.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12895281 + 32148900 = 3591^2 + 5670^2 .

It is not a de Polignac number, because 45044181 - 2¹ = 45044179 is a prime.

It is a super-2 number, since 2×45044181² = 4057956483921522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45044171) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 464325 + ... + 464421.

It is an arithmetic number, because the mean of its divisors is an integer number (1017583).

Almost surely, 2^45044181 is an apocalyptic number.

It is an amenable number.

45044181 is a deficient number, since it is larger than the sum of its proper divisors (40432791).

45044181 is an equidigital number, since it uses as much as digits as its factorization.

45044181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 45044181 is about 6711.4961819255. The cubic root of 45044181 is about 355.8056976358.

The spelling of 45044181 in words is "forty-five million, forty-four thousand, one hundred eighty-one".