Q: What is the digital root of 21,109,301

 A: 8

Why is 8 the digital root of the number 21,109,301?

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.

How do you calculate the digital root of 21,109,301?


Split the number up and add each digit together:


2 + 1 + 1 + 0 + 9 + 3 + 0 + 1 = 17

If the answer is more than one digit, you would add each digit of the answer together again:

1 + 7 = 8

What is the digital root of number 21,109,301?

Answer: 8


More Examples

Number 21,109,29921,109,30021,109,30221,109,303
Digital Root 6791

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