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Separate numbers by space or comma, e.g. 1 2 3 or 1,2,3 or -1,0,1.
Enter ranges with a colon or hyphen, e.g. 1-100 or -10:10. Negative numbers allowed.
Digit sum, sum, average and prime tests — click the result to copy.
Enter numbers as a list or range — spaces, commas and hyphens all work (e.g. 1 2,3,4 5-9 or 1-100). Choose sum of digits (with digital root), sum of numbers, average, or a prime number test.
Example: the digits 1 through 9 give a digit sum of 45 with digital root 9. Test a single number like 17 for primality, or check an entire range at once.
Separate numbers by space or comma, e.g. 1 2 3 or 1,2,3 or -1,0,1.
Enter ranges with a colon or hyphen, e.g. 1-100 or -10:10. Negative numbers allowed.