216203 has 4 divisors (see below), whose sum is σ = 232848. Its totient is φ = 199560.

The previous prime is 216179. The next prime is 216211. The reversal of 216203 is 302612.

216203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216203 - 2¹⁰ = 215179 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (216233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8303 + ... + 8328.

It is an arithmetic number, because the mean of its divisors is an integer number (58212).

2²¹⁶²⁰³ is an apocalyptic number.

216203 is a deficient number, since it is larger than the sum of its proper divisors (16645).

216203 is a wasteful number, since it uses less digits than its factorization.

216203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16644.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 216203 is about 464.9763434843. The cubic root of 216203 is about 60.0187904110.

Adding to 216203 its reverse (302612), we get a palindrome (518815).

The spelling of 216203 in words is "two hundred sixteen thousand, two hundred three".