206222201 has 4 divisors (see below), whose sum is σ = 211795812. Its totient is φ = 200648592.

The previous prime is 206222179. The next prime is 206222213. The reversal of 206222201 is 102222602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102222602 = 2 ⋅51111301.

It can be written as a sum of positive squares in 2 ways, for example, as 169000000 + 37222201 = 13000^2 + 6101^2 .

It is a cyclic number.

It is not a de Polignac number, because 206222201 - 2¹⁰ = 206221177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206222201.

It is not an unprimeable number, because it can be changed into a prime (206222231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2786750 + ... + 2786823.

It is an arithmetic number, because the mean of its divisors is an integer number (52948953).

Almost surely, 2^206222201 is an apocalyptic number.

It is an amenable number.

206222201 is a deficient number, since it is larger than the sum of its proper divisors (5573611).

206222201 is an equidigital number, since it uses as much as digits as its factorization.

206222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573610.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 206222201 is about 14360.4387467793. The cubic root of 206222201 is about 590.8063292926.

Adding to 206222201 its reverse (102222602), we get a palindrome (308444803).

The spelling of 206222201 in words is "two hundred six million, two hundred twenty-two thousand, two hundred one".