220010209 has 12 divisors (see below), whose sum is σ = 235816524. Its totient is φ = 205205504.

The previous prime is 220010207. The next prime is 220010213. The reversal of 220010209 is 902010022.

It is a happy number.

220010209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 140625 + 219869584 = 375^2 + 14828^2 .

It is not a de Polignac number, because 220010209 - 2¹ = 220010207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220010192 and 220010201.

It is not an unprimeable number, because it can be changed into a prime (220010201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29289 + ... + 36025.

It is an arithmetic number, because the mean of its divisors is an integer number (19651377).

Almost surely, 2^220010209 is an apocalyptic number.

It is an amenable number.

220010209 is a deficient number, since it is larger than the sum of its proper divisors (15806315).

220010209 is a wasteful number, since it uses less digits than its factorization.

220010209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884 (or 6867 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 220010209 is about 14832.7411155187. The cubic root of 220010209 is about 603.6904113839.

The spelling of 220010209 in words is "two hundred twenty million, ten thousand, two hundred nine".