Q: What is the digital root of 643,521,407

 A: 5

Why is 5 the digital root of the number 643,521,407?

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 643,521,407?


Split the number up and add each digit together:


6 + 4 + 3 + 5 + 2 + 1 + 4 + 0 + 7 = 32

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

3 + 2 = 5

What is the digital root of number 643,521,407?

Answer: 5


More Examples

Number 643,521,405643,521,406643,521,408643,521,409
Digital Root 3467

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