200021166 has 12 divisors (see below), whose sum is σ = 433379232. Its totient is φ = 66673716.

The previous prime is 200021153. The next prime is 200021177. The reversal of 200021166 is 661120002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11112287 = 200021166 / (2 + 0 + 0 + 0 + 2 + 1 + 1 + 6 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5556126 + ... + 5556161.

It is an arithmetic number, because the mean of its divisors is an integer number (36114936).

Almost surely, 2^200021166 is an apocalyptic number.

200021166 is an abundant number, since it is smaller than the sum of its proper divisors (233358066).

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

200021166 is a wasteful number, since it uses less digits than its factorization.

200021166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11112295 (or 11112292 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 200021166 is about 14142.8839350396. The cubic root of 200021166 is about 584.8241768347.

Adding to 200021166 its reverse (661120002), we get a palindrome (861141168).

It can be divided in two parts, 20002 and 1166, that multiplied together give a palindrome (23322332).

The spelling of 200021166 in words is "two hundred million, twenty-one thousand, one hundred sixty-six".