22201866 has 12 divisors (see below), whose sum is σ = 48104082. Its totient is φ = 7400616.

The previous prime is 22201819. The next prime is 22201867. The reversal of 22201866 is 66810222.

It can be written as a sum of positive squares in only one way, i.e., 13111641 + 9090225 = 3621^2 + 3015^2 .

It is not an unprimeable number, because it can be changed into a prime (22201867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 616701 + ... + 616736.

Almost surely, 2^22201866 is an apocalyptic number.

22201866 is an abundant number, since it is smaller than the sum of its proper divisors (25902216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22201866 is a wasteful number, since it uses less digits than its factorization.

22201866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233445 (or 1233442 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22201866 is about 4711.8856098169. The cubic root of 22201866 is about 281.0583500277.

The spelling of 22201866 in words is "twenty-two million, two hundred one thousand, eight hundred sixty-six".