206155 has 4 divisors (see below), whose sum is σ = 247392. Its totient is φ = 164920.

The previous prime is 206153. The next prime is 206177. The reversal of 206155 is 551602.

It is a happy number.

206155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206155 - 2¹ = 206153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206153) 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, 20611 + ... + 20620.

It is an arithmetic number, because the mean of its divisors is an integer number (61848).

2²⁰⁶¹⁵⁵ is an apocalyptic number.

206155 is a deficient number, since it is larger than the sum of its proper divisors (41237).

206155 is an equidigital number, since it uses as much as digits as its factorization.

206155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41236.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 206155 is about 454.0429495103. The cubic root of 206155 is about 59.0742147568.

Adding to 206155 its reverse (551602), we get a palindrome (757757).

It can be divided in two parts, 2061 and 55, that added together give a square (2116 = 46²).

The spelling of 206155 in words is "two hundred six thousand, one hundred fifty-five".