55081 has 8 divisors (see below), whose sum is σ = 62720. Its totient is φ = 47952.
The previous prime is 55079. The next prime is 55103. The reversal of 55081 is 18055.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 55081 - 21 = 55079 is a prime.
It is a super-3 number, since 3×550813 = 501333474289323, which contains 333 as substring. Note that it is a super-d number also for d = 2.
It is a Harshad number since it is a multiple of its sum of digits (19).
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (55001) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136 + ... + 358.
It is an arithmetic number, because the mean of its divisors is an integer number (7840).
255081 is an apocalyptic number.
55081 is the 136-th hex number.
It is an amenable number.
55081 is a deficient number, since it is larger than the sum of its proper divisors (7639).
55081 is a wasteful number, since it uses less digits than its factorization.
55081 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 255.
The product of its (nonzero) digits is 200, while the sum is 19.
The square root of 55081 is about 234.6934170359. The cubic root of 55081 is about 38.0481844897.
The spelling of 55081 in words is "fifty-five thousand, eighty-one".
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