22006511 has 2 divisors, whose sum is σ = 22006512. Its totient is φ = 22006510.

The previous prime is 22006471. The next prime is 22006529. The reversal of 22006511 is 11560022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22006511 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22006511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22006531) 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, 11003255 + 11003256.

It is an arithmetic number, because the mean of its divisors is an integer number (11003256).

Almost surely, 2^22006511 is an apocalyptic number.

22006511 is a deficient number, since it is larger than the sum of its proper divisors (1).

22006511 is an equidigital number, since it uses as much as digits as its factorization.

22006511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 22006511 is about 4691.1097834095. The cubic root of 22006511 is about 280.2315728816.

Adding to 22006511 its reverse (11560022), we get a palindrome (33566533).

The spelling of 22006511 in words is "twenty-two million, six thousand, five hundred eleven".