22082181 has 16 divisors (see below), whose sum is σ = 32305728. Its totient is φ = 13305600.

The previous prime is 22082173. The next prime is 22082191. The reversal of 22082181 is 18128022.

It is not a de Polignac number, because 22082181 - 2³ = 22082173 is a prime.

It is a super-2 number, since 2×22082181² = 975245435433522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22082101) 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 15 ways as a sum of consecutive naturals, for example, 4125 + ... + 7821.

It is an arithmetic number, because the mean of its divisors is an integer number (2019108).

Almost surely, 2^22082181 is an apocalyptic number.

It is an amenable number.

22082181 is a deficient number, since it is larger than the sum of its proper divisors (10223547).

22082181 is a wasteful number, since it uses less digits than its factorization.

22082181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 22082181 is about 4699.1681178694. The cubic root of 22082181 is about 280.5524001228.

The spelling of 22082181 in words is "twenty-two million, eighty-two thousand, one hundred eighty-one".