EntityQ2300333· pop 16· linked from 229 articlesFriedman numberSign in to saveinteger expressible as an arrangement of its digits with simple mathematical operationsConnectionsprime numberEntitydecimalEntityOn-Line Encyclopedia of Integer SequencesEntityfigurate numberEntityautomorphic numberEntityarithmeticEntitynatural numberEntityintegerEntityRoman numeralsEntitydigital object identifierEntitybinary numeral systemEntitydigitEntityexponentiationEntitynumeral systemEntitythree-dimensional spaceEntitycodeEntitynatural languageEntityperfect numberEntityoctalEntitydivisorEntityCategoriesBase-dependent integer sequences