It is a semiprime because it is the product of two primes.
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 205655.
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 205655.
2205655 is an apocalyptic number.
205655 is an equidigital number, since it uses as much as digits as its factorization.
205655 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 41136.
The square root of 205655 is about 453.4920065448. The cubic root of 205655 is about 59.0264173568.
The spelling of 205655 in words is "two hundred five thousand, six hundred fifty-five".