206171 has 4 divisors (see below), whose sum is σ = 235632. Its totient is φ = 176712.

The previous prime is 206153. The next prime is 206177. The reversal of 206171 is 171602.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206177) 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, 14720 + ... + 14733.

It is an arithmetic number, because the mean of its divisors is an integer number (58908).

2²⁰⁶¹⁷¹ is an apocalyptic number.

206171 is a deficient number, since it is larger than the sum of its proper divisors (29461).

206171 is an equidigital number, since it uses as much as digits as its factorization.

206171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29460.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 206171 is about 454.0605686470. The cubic root of 206171 is about 59.0757429969.

Adding to 206171 its reverse (171602), we get a palindrome (377773).

The spelling of 206171 in words is "two hundred six thousand, one hundred seventy-one".