16555 has 16 divisors (see below), whose sum is σ = 25344. Its totient is φ = 10080.

The previous prime is 16553. The next prime is 16561. The reversal of 16555 is 55561.

16555 = 50² + 51² + ... + 55².

16555 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16555 - 2¹ = 16553 is a prime.

16555 is strictly pandigital in base 6.

It is not an unprimeable number, because it can be changed into a prime (16553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364 + ... + 406.

It is an arithmetic number, because the mean of its divisors is an integer number (1584).

2¹⁶⁵⁵⁵ is an apocalyptic number.

16555 is a deficient number, since it is larger than the sum of its proper divisors (8789).

16555 is a wasteful number, since it uses less digits than its factorization.

16555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66.

The product of its digits is 750, while the sum is 22.

The square root of 16555 is about 128.6662348870. Note that the first 3 decimals coincide. The cubic root of 16555 is about 25.4864723841.

It can be divided in two parts, 1 and 6555, that added together give a palindrome (6556).

The spelling of 16555 in words is "sixteen thousand, five hundred fifty-five".