168551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-168551 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 168551.
It is a congruent number.
2168551 is an apocalyptic number.
168551 is an equidigital number, since it uses as much as digits as its factorization.
168551 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4152.
The square root of 168551 is about 410.5496315916. The cubic root of 168551 is about 55.2387417940.
The spelling of 168551 in words is "one hundred sixty-eight thousand, five hundred fifty-one".