216347 has 2 divisors, whose sum is σ = 216348. Its totient is φ = 216346.

The previous prime is 216329. The next prime is 216371. The reversal of 216347 is 743612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216347 - 2⁸ = 216091 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 1 + 3⁹ + 6 + 4⁸ + 7² .

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

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216347.

It is not a weakly prime, because it can be changed into another prime (216317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108173 + 108174.

It is an arithmetic number, because the mean of its divisors is an integer number (108174).

2²¹⁶³⁴⁷ is an apocalyptic number.

216347 is a deficient number, since it is larger than the sum of its proper divisors (1).

216347 is an equidigital number, since it uses as much as digits as its factorization.

216347 is an evil number, because the sum of its binary digits is even.

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

The square root of 216347 is about 465.1311642967. The cubic root of 216347 is about 60.0321124398.

Adding to 216347 its reverse (743612), we get a palindrome (959959).

The spelling of 216347 in words is "two hundred sixteen thousand, three hundred forty-seven".