It is a happy number.
655503203 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 Duffinian number.
Almost surely, 2655503203 is an apocalyptic number.
655503203 is a wasteful number, since it uses less digits than its factorization.
655503203 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15987924.
The square root of 655503203 is about 25602.7967808206. The cubic root of 655503203 is about 868.6768997513.
Adding to 655503203 its reverse (302305556), we get a palindrome (957808759).
The spelling of 655503203 in words is "six hundred fifty-five million, five hundred three thousand, two hundred three".