22282181 has 2 divisors, whose sum is σ = 22282182. Its totient is φ = 22282180.

The previous prime is 22282171. The next prime is 22282199. The reversal of 22282181 is 18128222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14250625 + 8031556 = 3775^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 22282181 - 2¹⁴ = 22265797 is a prime.

It is a super-2 number, since 2×22282181² = 992991180233522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22282181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22282171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11141090 + 11141091.

It is an arithmetic number, because the mean of its divisors is an integer number (11141091).

Almost surely, 2^22282181 is an apocalyptic number.

It is an amenable number.

22282181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22282181 is an equidigital number, since it uses as much as digits as its factorization.

22282181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 26.

The square root of 22282181 is about 4720.4005126684. The cubic root of 22282181 is about 281.3968506523.

The spelling of 22282181 in words is "twenty-two million, two hundred eighty-two thousand, one hundred eighty-one".