216343117 has 4 divisors (see below), whose sum is σ = 216656896. Its totient is φ = 216029340.

The previous prime is 216343081. The next prime is 216343123. The reversal of 216343117 is 711343612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216343117 - 2¹⁵ = 216310349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216343187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155853 + ... + 157234.

It is an arithmetic number, because the mean of its divisors is an integer number (54164224).

Almost surely, 2^216343117 is an apocalyptic number.

It is an amenable number.

216343117 is a deficient number, since it is larger than the sum of its proper divisors (313779).

216343117 is an equidigital number, since it uses as much as digits as its factorization.

216343117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313778.

The product of its digits is 3024, while the sum is 28.

The square root of 216343117 is about 14708.6069020829. The cubic root of 216343117 is about 600.3175328511.

Adding to 216343117 its reverse (711343612), we get a palindrome (927686729).

The spelling of 216343117 in words is "two hundred sixteen million, three hundred forty-three thousand, one hundred seventeen".