Adding to 2169 its sum of digits (18), we get a 7-th power (2187 = 37).
Adding to 2169 its reverse (9612), we get a triangular number (11781 = T153).
2169 is nontrivially palindromic in base 15.
2169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Leyland number of the form 112 + 211.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
It is a Curzon number.
2169 is a nontrivial repdigit in base 15.
It is a plaindrome in base 15.
It is a nialpdrome in base 3 and base 15.
It is a zygodrome in base 15.
It is an amenable number.
2169 is a wasteful number, since it uses less digits than its factorization.
2169 is an evil number, because the sum of its binary digits is even.
The square root of 2169 is about 46.5725240888. The cubic root of 2169 is about 12.9445368846.
The spelling of 2169 in words is "two thousand, one hundred sixty-nine".