Q: What is the digital root of 21,789,537

 A: 6

Why is 6 the digital root of the number 21,789,537?

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 21,789,537?


Split the number up and add each digit together:


2 + 1 + 7 + 8 + 9 + 5 + 3 + 7 = 42

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

4 + 2 = 6

What is the digital root of number 21,789,537?

Answer: 6


More Examples

Number 21,789,53521,789,53621,789,53821,789,539
Digital Root 4578

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