220000209 has 16 divisors (see below), whose sum is σ = 344616384. Its totient is φ = 123076800.

The previous prime is 220000201. The next prime is 220000237. The reversal of 220000209 is 902000022.

It is not a de Polignac number, because 220000209 - 2³ = 220000201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220000201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255982 + ... + 256839.

It is an arithmetic number, because the mean of its divisors is an integer number (21538524).

Almost surely, 2^220000209 is an apocalyptic number.

It is an amenable number.

220000209 is a deficient number, since it is larger than the sum of its proper divisors (124616175).

220000209 is a wasteful number, since it uses less digits than its factorization.

220000209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512848.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 220000209 is about 14832.4040195782. The cubic root of 220000209 is about 603.6812648454.

The spelling of 220000209 in words is "two hundred twenty million, two hundred nine", and thus it is an aban number.