216234 has 24 divisors (see below), whose sum is σ = 481572. Its totient is φ = 70080.

The previous prime is 216233. The next prime is 216259. The reversal of 216234 is 432612.

It is a happy number.

216234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 216225 + 9 = 465^2 + 3^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (216233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 592 + ... + 884.

2²¹⁶²³⁴ is an apocalyptic number.

216234 is an abundant number, since it is smaller than the sum of its proper divisors (265338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216234 is a wasteful number, since it uses less digits than its factorization.

216234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 339 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 216234 is about 465.0096773187. The cubic root of 216234 is about 60.0216588473.

Adding to 216234 its reverse (432612), we get a palindrome (648846).

The spelling of 216234 in words is "two hundred sixteen thousand, two hundred thirty-four".