211

This number is a prime.

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Each of the three sets of numbers that solve the minimal magic die puzzle can produce exactly 211 different patterns. [Gaydos]

The Cleavers lived at 211 Pine Street for most of the television series "Leave It to Beaver." [Gaydos]

The smallest number n for which the sum of the first n Honaker primes (4293721) and the sum of their prime indices (473761) are both prime numbers with the same sum of digits (28). [Gaydos]

There are 211 cases of the product of a prime number and its prime index having distinct digits. [Gaydos]

There are probably only 211 Fibonacci numbers that contain one or more unique digits. The largest being the 457th which has only one 2. [Gaydos]