2171 has 4 divisors (see below), whose sum is σ = 2352. Its totient is φ = 1992.

The previous prime is 2161. The next prime is 2179. The reversal of 2171 is 1712.

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-2171 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 7, base 13 and base 14.

It is not an unprimeable number, because it can be changed into a prime (2179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71 + ... + 96.

It is an arithmetic number, because the mean of its divisors is an integer number (588).

2171 is a deficient number, since it is larger than the sum of its proper divisors (181).

2171 is a wasteful number, since it uses less digits than its factorization.

2171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180.

The product of its digits is 14, while the sum is 11.

The square root of 2171 is about 46.5939910289. The cubic root of 2171 is about 12.9485143121.

Adding to 2171 its reverse (1712), we get a palindrome (3883).

The spelling of 2171 in words is "two thousand, one hundred seventy-one", and thus it is an iban number.