22181069 has 2 divisors, whose sum is σ = 22181070. Its totient is φ = 22181068.

The previous prime is 22181059. The next prime is 22181147. The reversal of 22181069 is 96018122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18232900 + 3948169 = 4270^2 + 1987^2 .

It is a cyclic number.

It is not a de Polignac number, because 22181069 - 2⁸ = 22180813 is a prime.

It is a super-2 number, since 2×22181069² = 983999643965522, 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 (22181009) by changing a digit.

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 as a sum of consecutive naturals, namely, 11090534 + 11090535.

It is an arithmetic number, because the mean of its divisors is an integer number (11090535).

Almost surely, 2^22181069 is an apocalyptic number.

It is an amenable number.

22181069 is a deficient number, since it is larger than the sum of its proper divisors (1).

22181069 is an equidigital number, since it uses as much as digits as its factorization.

22181069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 22181069 is about 4709.6782268006. The cubic root of 22181069 is about 280.9705646653.

The spelling of 22181069 in words is "twenty-two million, one hundred eighty-one thousand, sixty-nine".