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What Special Or Famous Events, Or Math Facts Include The Number 81?

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    Eartha Kitt died at the age of 81.

    In 1881, Barnum and Bailey's "Greatest Show on Earth" opened. Later that same year the Red Cross was founded by Clara Barton.

    It is a Harshad number, and one of three non-trivial numbers (the other two are 1458 and 1729)
    which, when its digits are added together, produces a sum which, when
    multiplied by its reversed self, yields the original number

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    Oddman 

    answered 1 year ago

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