Q: What is the digital root of 21,087,407

Why is 2 the digital root of the number 21,087,407?

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 21,087,407?

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:

The answer is more than one digit again, we need to add each digit one more time:

What is the digital root of number 21,087,407?

Answer: 2

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