216734 has 16 divisors (see below), whose sum is σ = 377568. Its totient is φ = 91392.

The previous prime is 216731. The next prime is 216743. The reversal of 216734 is 437612.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216731) 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 7 ways as a sum of consecutive naturals, for example, 1514 + ... + 1650.

It is an arithmetic number, because the mean of its divisors is an integer number (23598).

2²¹⁶⁷³⁴ is an apocalyptic number.

216734 is a deficient number, since it is larger than the sum of its proper divisors (160834).

216734 is a wasteful number, since it uses less digits than its factorization.

216734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259.

The product of its digits is 1008, while the sum is 23.

The square root of 216734 is about 465.5469901095. The cubic root of 216734 is about 60.0678861252.

The spelling of 216734 in words is "two hundred sixteen thousand, seven hundred thirty-four".