216059 has 4 divisors (see below), whose sum is σ = 220704. Its totient is φ = 211416.

The previous prime is 216037. The next prime is 216061. The reversal of 216059 is 950612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216059 - 2¹⁶ = 150523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252 + ... + 2345.

It is an arithmetic number, because the mean of its divisors is an integer number (55176).

216059 is a Friedman number, since it can be written as 60^(2+1)+59, using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁵⁹ is an apocalyptic number.

216059 is a deficient number, since it is larger than the sum of its proper divisors (4645).

216059 is an equidigital number, since it uses as much as digits as its factorization.

216059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 216059 is about 464.8214711048. The cubic root of 216059 is about 60.0054624656.

It can be divided in two parts, 2 and 16059, that added together give a palindrome (16061).

The spelling of 216059 in words is "two hundred sixteen thousand, fifty-nine".