22088861 has 2 divisors, whose sum is σ = 22088862. Its totient is φ = 22088860.

The previous prime is 22088839. The next prime is 22088879. The reversal of 22088861 is 16888022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22033636 + 55225 = 4694^2 + 235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22088861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22082861) 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, 11044430 + 11044431.

It is an arithmetic number, because the mean of its divisors is an integer number (11044431).

Almost surely, 2^22088861 is an apocalyptic number.

It is an amenable number.

22088861 is a deficient number, since it is larger than the sum of its proper divisors (1).

22088861 is an equidigital number, since it uses as much as digits as its factorization.

22088861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 22088861 is about 4699.8788282253. The cubic root of 22088861 is about 280.5806868983.

The spelling of 22088861 in words is "twenty-two million, eighty-eight thousand, eight hundred sixty-one".