22808861 has 2 divisors, whose sum is σ = 22808862. Its totient is φ = 22808860.

The previous prime is 22808843. The next prime is 22808867. The reversal of 22808861 is 16880822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14485636 + 8323225 = 3806^2 + 2885^2 .

It is a cyclic number.

It is not a de Polignac number, because 22808861 - 2¹⁴ = 22792477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22808867) 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, 11404430 + 11404431.

It is an arithmetic number, because the mean of its divisors is an integer number (11404431).

Almost surely, 2^22808861 is an apocalyptic number.

It is an amenable number.

22808861 is a deficient number, since it is larger than the sum of its proper divisors (1).

22808861 is an equidigital number, since it uses as much as digits as its factorization.

22808861 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 22808861 is about 4775.8623305116. The cubic root of 22808861 is about 283.5967173301.

The spelling of 22808861 in words is "twenty-two million, eight hundred eight thousand, eight hundred sixty-one".