216747 has 6 divisors (see below), whose sum is σ = 313092. Its totient is φ = 144492.

The previous prime is 216743. The next prime is 216751. The reversal of 216747 is 747612.

It is an interprime number because it is at equal distance from previous prime (216743) and next prime (216751).

It is not a de Polignac number, because 216747 - 2² = 216743 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 216747.

It is not an unprimeable number, because it can be changed into a prime (216743) 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 5 ways as a sum of consecutive naturals, for example, 12033 + ... + 12050.

It is an arithmetic number, because the mean of its divisors is an integer number (52182).

2²¹⁶⁷⁴⁷ is an apocalyptic number.

216747 is a deficient number, since it is larger than the sum of its proper divisors (96345).

216747 is a wasteful number, since it uses less digits than its factorization.

216747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24089 (or 24086 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 216747 is about 465.5609519708. The cubic root of 216747 is about 60.0690870857.

The spelling of 216747 in words is "two hundred sixteen thousand, seven hundred forty-seven".