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Meaning of vampire number | Babel Free

Noun CEFR B2

Definitions

A composite natural number with an even number of digits that can be factored into two natural numbers (called "fangs") each with half as many digits as the original number, and where the two factors contain precisely all the digits of the original number, in any order, counting multiplicity.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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See also

vampire squid vampire syndrome vampire taco vampire tea bag vampire teabag vampire time

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