Adding to 550520 its reverse (25055), we get a palindrome (575575).
It is a happy number.
It is a congruent number.
It is an unprimeable number.
2550520 is an apocalyptic number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
550520 is a wasteful number, since it uses less digits than its factorization.
550520 is an odious number, because the sum of its binary digits is odd.
The square root of 550520 is about 741.9703498119. The cubic root of 550520 is about 81.9579399608.
The spelling of 550520 in words is "five hundred fifty thousand, five hundred twenty".