9551 is nontrivially palindromic in base 7.
9551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is a Chen prime.
It is a plaindrome in base 13.
It is a nialpdrome in base 10.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 9551.
It is an upside-down number.
29551 is an apocalyptic number.
9551 is an equidigital number, since it uses as much as digits as its factorization.
9551 is an evil number, because the sum of its binary digits is even.
The square root of 9551 is about 97.7292177396. The cubic root of 9551 is about 21.2169497769.
The spelling of 9551 in words is "nine thousand, five hundred fifty-one".