22288261 has 2 divisors, whose sum is σ = 22288262. Its totient is φ = 22288260.

The previous prime is 22288247. The next prime is 22288267. The reversal of 22288261 is 16288222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 2307361 = 4470^2 + 1519^2 .

It is a cyclic number.

It is not a de Polignac number, because 22288261 - 2⁵ = 22288229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22288267) 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, 11144130 + 11144131.

It is an arithmetic number, because the mean of its divisors is an integer number (11144131).

Almost surely, 2^22288261 is an apocalyptic number.

It is an amenable number.

22288261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288261 is an equidigital number, since it uses as much as digits as its factorization.

22288261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 22288261 is about 4721.0444818917. The cubic root of 22288261 is about 281.4224426602.

The spelling of 22288261 in words is "twenty-two million, two hundred eighty-eight thousand, two hundred sixty-one".