cryptarithmetic
/ˌkrɪptəˈrɪθmətɪk/noun
A branch of mathematics concerned with creating and solving cryptarithms; cryptarithms collectively.
adjective
Of the nature of a cryptarithm; involving or relating to cryptarithms.
Origin
1940s. From crypto- + arithmetic, after French cryptarithmique or its etymon cryptarithmie, noun.