55555 is nontrivially palindromic in base 10.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a nude number because it is divisible by every one of its digits.
It is an Ulam number.
It is a Duffinian number.
55555 is a lucky number.
55555 is a nontrivial repdigit in base 10.
It is a plaindrome in base 10.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
It is an unprimeable number.
It is an upside-down number.
255555 is an apocalyptic number.
55555 is a wasteful number, since it uses less digits than its factorization.
55555 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 317.
The square root of 55555 is about 235.7010818813. The cubic root of 55555 is about 38.1570142275.
The spelling of 55555 in words is "fifty-five thousand, five hundred fifty-five".