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 2k-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.
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 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.