216087 has 16 divisors (see below), whose sum is σ = 322560. Its totient is φ = 127872.

The previous prime is 216071. The next prime is 216091. The reversal of 216087 is 780612.

216087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216087 - 2⁴ = 216071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216037) 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, 858 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

216087 is a Friedman number, since it can be written as 87+60^(2+1), using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁸⁷ is an apocalyptic number.

216087 is a deficient number, since it is larger than the sum of its proper divisors (106473).

216087 is a wasteful number, since it uses less digits than its factorization.

216087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 216087 is about 464.8515892196. The cubic root of 216087 is about 60.0080544743.

Adding to 216087 its reverse (780612), we get a palindrome (996699).

The spelling of 216087 in words is "two hundred sixteen thousand, eighty-seven".