Smith numbers are numbers such that if you add up all of the digits in the number, that sum equals the sum of all of the digits in all of their factors. This term was coined by Albert Wilansky, when he noticed the defining property in the phone number of his brother-in-law Harold Smith: 493-7775.
4+9+3+7+7+7+5=42
The prime factors of 4937775 are 3, 5, 5, and 65837. 3+5+5+(6+5+8+3+7) = 42
Since all prime numbers obviously meet this criteria, Smith numbers are defined as composite numbers. Write a MATLAB function that will tell you if a given number is a Smith number.
Solve

Solution Stats

98 Solutions

48 Solvers

Last Solution submitted on Dec 07, 2025

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers48

Riccardo G. Abhijit Mehdi Dehghan Hong Son

Suggested Problems

More from this Author80

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!