216755 has 16 divisors (see below), whose sum is σ = 324864. Its totient is φ = 134880.

The previous prime is 216751. The next prime is 216757. The reversal of 216755 is 557612.

It is not a de Polignac number, because 216755 - 2² = 216751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104 + ... + 666.

It is an arithmetic number, because the mean of its divisors is an integer number (20304).

2²¹⁶⁷⁵⁵ is an apocalyptic number.

216755 is a deficient number, since it is larger than the sum of its proper divisors (108109).

216755 is a wasteful number, since it uses less digits than its factorization.

216755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586.

The product of its digits is 2100, while the sum is 26.

The square root of 216755 is about 465.5695436774. The cubic root of 216755 is about 60.0698261144.

It can be divided in two parts, 2167 and 55, that added together give a palindrome (2222).

The spelling of 216755 in words is "two hundred sixteen thousand, seven hundred fifty-five".