55011 has 8 divisors (see below), whose sum is σ = 80064. Its totient is φ = 33320.

The previous prime is 55009. The next prime is 55021. The reversal of 55011 is 11055.

Added to its reverse (11055) it gives a triangular number (66066 = T₃₆₃).

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 55011 - 2¹ = 55009 is a prime.

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, 801 + ... + 866.

It is an arithmetic number, because the mean of its divisors is an integer number (10008).

2⁵⁵⁰¹¹ is an apocalyptic number.

55011 is a deficient number, since it is larger than the sum of its proper divisors (25053).

55011 is a wasteful number, since it uses less digits than its factorization.

55011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 55011 is about 234.5442388975. The cubic root of 55011 is about 38.0320597403.

Adding to 55011 its reverse (11055), we get a palindrome (66066).

Subtracting from 55011 its reverse (11055), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 550 and 11, that added together give a triangular number (561 = T₃₃).

The spelling of 55011 in words is "fifty-five thousand, eleven".