Specific help

Wow...that was kool !  I like it.....

If the number is  984 770 902 183 611 232 881

and if you are allowed to assume that the 22nd root is a whole number,

then:

-- because 10²²  =  10 000 000 000 000 000 000 000, the answer must be a one-digit number

-- because the last digit is 1, the number must be either 3, 7, or 9

-- because the sum of the digits is 90, the number is divisible by 9

so:  the choice must be 9.

VERY REASONABLE AND WELL EXPLAINED THANK YOUUUUUUU