22033181 has 2 divisors, whose sum is σ = 22033182. Its totient is φ = 22033180.

The previous prime is 22033163. The next prime is 22033211. The reversal of 22033181 is 18133022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 2088025 = 4466^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 22033181 - 2⁶ = 22033117 is a prime.

It is a super-2 number, since 2×22033181² = 970922129957522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22033111) 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 as a sum of consecutive naturals, namely, 11016590 + 11016591.

It is an arithmetic number, because the mean of its divisors is an integer number (11016591).

Almost surely, 2^22033181 is an apocalyptic number.

It is an amenable number.

22033181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22033181 is an equidigital number, since it uses as much as digits as its factorization.

22033181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22033181 is about 4693.9515336228. The cubic root of 22033181 is about 280.3447327079.

The spelling of 22033181 in words is "twenty-two million, thirty-three thousand, one hundred eighty-one".