206112222 has 32 divisors (see below), whose sum is σ = 473824800. Its totient is φ = 66334464.

The previous prime is 206112217. The next prime is 206112239. The reversal of 206112222 is 222211602.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 206112195 and 206112204.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 64243 + ... + 67374.

It is an arithmetic number, because the mean of its divisors is an integer number (14807025).

Almost surely, 2^206112222 is an apocalyptic number.

206112222 is an abundant number, since it is smaller than the sum of its proper divisors (267712578).

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

206112222 is a wasteful number, since it uses less digits than its factorization.

206112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131657 (or 131651 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 206112222 is about 14356.6090007355. The cubic root of 206112222 is about 590.7012842763.

Adding to 206112222 its reverse (222211602), we get a palindrome (428323824).

The spelling of 206112222 in words is "two hundred six million, one hundred twelve thousand, two hundred twenty-two".