Q: What is the digital root of 217,664,509
A: 4
The digital root of a number is calculated by splitting the digits of a number and then adding them together. You keep splitting and adding the digits until you reach a single positive number.
Split the number up and add each digit together:
If the answer is more than one digit, you would add each digit of the answer together again:
What is the digital root of number 217,664,509?
Answer: 4
Number | 217,664,507 | 217,664,508 | 217,664,510 | 217,664,511 |
Digital Root | 2 | 3 | 5 | 6 |