181444181 has 4 divisors (see below), whose sum is σ = 181481664. Its totient is φ = 181406700.

The previous prime is 181444169. The next prime is 181444183.

181444181 is nontrivially palindromic in base 10.

181444181 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 181444181 - 2¹⁴ = 181427797 is a prime.

It is a super-2 number, since 2×181444181² = 65843981637521522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181444183) 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, 10175 + ... + 21596.

It is an arithmetic number, because the mean of its divisors is an integer number (45370416).

Almost surely, 2^181444181 is an apocalyptic number.

It is an amenable number.

181444181 is a deficient number, since it is larger than the sum of its proper divisors (37483).

181444181 is an equidigital number, since it uses as much as digits as its factorization.

181444181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37482.

The product of its digits is 4096, while the sum is 32.

The square root of 181444181 is about 13470.1217886105. The cubic root of 181444181 is about 566.1276260787.

The spelling of 181444181 in words is "one hundred eighty-one million, four hundred forty-four thousand, one hundred eighty-one".