216056 has 16 divisors (see below), whose sum is σ = 410400. Its totient is φ = 106624.

The previous prime is 216037. The next prime is 216061. The reversal of 216056 is 650612.

216056 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

216056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 785 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (25650).

216056 is a Friedman number, since it can be written as 60^(2+1)+56, using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

216056 is a deficient number, since it is larger than the sum of its proper divisors (194344).

216056 is a wasteful number, since it uses less digits than its factorization.

216056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 216056 is about 464.8182440481. The cubic root of 216056 is about 60.0051847371.

Adding to 216056 its reverse (650612), we get a palindrome (866668).

The spelling of 216056 in words is "two hundred sixteen thousand, fifty-six".