216847 has 8 divisors (see below), whose sum is σ = 232560. Its totient is φ = 201600.

The previous prime is 216841. The next prime is 216851. The reversal of 216847 is 748612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216847 - 2⁷ = 216719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216841) 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, 1863 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (29070).

2²¹⁶⁸⁴⁷ is an apocalyptic number.

216847 is a deficient number, since it is larger than the sum of its proper divisors (15713).

216847 is a wasteful number, since it uses less digits than its factorization.

216847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233.

The product of its digits is 2688, while the sum is 28.

The square root of 216847 is about 465.6683369094. The cubic root of 216847 is about 60.0783236382.

The spelling of 216847 in words is "two hundred sixteen thousand, eight hundred forty-seven".