digit sum
Given an integer consisting of digits in base , let
then is the digit sum of . Iterating this operation on the digits of until gives the digital root or repeated digit sum of . The digit sum and digital root of a number are the same only if the additive persistence of the digital root is 1.
Title | digit sum |
---|---|
Canonical name | DigitSum |
Date of creation | 2013-03-22 16:22:53 |
Last modified on | 2013-03-22 16:22:53 |
Owner | PrimeFan (13766) |
Last modified by | PrimeFan (13766) |
Numerical id | 5 |
Author | PrimeFan (13766) |
Entry type | Definition |
Classification | msc 11A63 |