22287871 has 2 divisors, whose sum is σ = 22287872. Its totient is φ = 22287870.

The previous prime is 22287857. The next prime is 22287929. The reversal of 22287871 is 17878222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22287871 - 2⁹ = 22287359 is a prime.

It is a Chen prime.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 22287871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22287821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11143935 + 11143936.

It is an arithmetic number, because the mean of its divisors is an integer number (11143936).

Almost surely, 2^22287871 is an apocalyptic number.

22287871 is a deficient number, since it is larger than the sum of its proper divisors (1).

22287871 is an equidigital number, since it uses as much as digits as its factorization.

22287871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 37.

The square root of 22287871 is about 4721.0031772919. The cubic root of 22287871 is about 281.4208012073.

The spelling of 22287871 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred seventy-one".