22180085 has 4 divisors (see below), whose sum is σ = 26616108. Its totient is φ = 17744064.

The previous prime is 22180063. The next prime is 22180111. The reversal of 22180085 is 58008122.

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 10387729 + 11792356 = 3223^2 + 3434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22180085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2218004 + ... + 2218013.

It is an arithmetic number, because the mean of its divisors is an integer number (6654027).

Almost surely, 2^22180085 is an apocalyptic number.

It is an amenable number.

22180085 is a deficient number, since it is larger than the sum of its proper divisors (4436023).

22180085 is an equidigital number, since it uses as much as digits as its factorization.

22180085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436022.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 22180085 is about 4709.5737599065. The cubic root of 22180085 is about 280.9664097841.

The spelling of 22180085 in words is "twenty-two million, one hundred eighty thousand, eighty-five".