22142866 has 16 divisors (see below), whose sum is σ = 36092160. Its totient is φ = 10149840.

The previous prime is 22142849. The next prime is 22142867. The reversal of 22142866 is 66824122.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (22142867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8221 + ... + 10576.

It is an arithmetic number, because the mean of its divisors is an integer number (2255760).

Almost surely, 2^22142866 is an apocalyptic number.

22142866 is a deficient number, since it is larger than the sum of its proper divisors (13949294).

22142866 is a wasteful number, since it uses less digits than its factorization.

22142866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18849.

The product of its digits is 9216, while the sum is 31.

The square root of 22142866 is about 4705.6206816955. The cubic root of 22142866 is about 280.8091644669.

Adding to 22142866 its reverse (66824122), we get a palindrome (88966988).

The spelling of 22142866 in words is "twenty-two million, one hundred forty-two thousand, eight hundred sixty-six".