22109287 has 2 divisors, whose sum is σ = 22109288. Its totient is φ = 22109286.

The previous prime is 22109273. The next prime is 22109341. The reversal of 22109287 is 78290122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22109287 - 2¹⁵ = 22076519 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 (22109237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11054643 + 11054644.

It is an arithmetic number, because the mean of its divisors is an integer number (11054644).

Almost surely, 2^22109287 is an apocalyptic number.

22109287 is a deficient number, since it is larger than the sum of its proper divisors (1).

22109287 is an equidigital number, since it uses as much as digits as its factorization.

22109287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 22109287 is about 4702.0513608424. The cubic root of 22109287 is about 280.6671463956.

The spelling of 22109287 in words is "twenty-two million, one hundred nine thousand, two hundred eighty-seven".