22027861 has 2 divisors, whose sum is σ = 22027862. Its totient is φ = 22027860.

The previous prime is 22027847. The next prime is 22027867. The reversal of 22027861 is 16872022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16760836 + 5267025 = 4094^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 22027861 - 2⁵ = 22027829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22027867) 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, 11013930 + 11013931.

It is an arithmetic number, because the mean of its divisors is an integer number (11013931).

Almost surely, 2^22027861 is an apocalyptic number.

It is an amenable number.

22027861 is a deficient number, since it is larger than the sum of its proper divisors (1).

22027861 is an equidigital number, since it uses as much as digits as its factorization.

22027861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 22027861 is about 4693.3848126912. The cubic root of 22027861 is about 280.3221674379.

Adding to 22027861 its reverse (16872022), we get a palindrome (38899883).

The spelling of 22027861 in words is "twenty-two million, twenty-seven thousand, eight hundred sixty-one".