The digits in the number 2187 form the two vampire numbers: and . 2187 is also given by .
2187
See also
Vampire NumberExplore with Wolfram|Alpha
References
Gardner, M. "Lucky Numbers and 2187." Math. Intell. 19, 26-29, Spring 1997.Cite this as:
Weisstein, Eric W. "2187." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/2187.html