216235243 has 8 divisors (see below), whose sum is σ = 249573600. Its totient is φ = 183508800.

The previous prime is 216235241. The next prime is 216235249. The reversal of 216235243 is 342532612.

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 216235243 - 2¹ = 216235241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216235241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152218 + ... + 153631.

It is an arithmetic number, because the mean of its divisors is an integer number (31196700).

Almost surely, 2^216235243 is an apocalyptic number.

216235243 is a deficient number, since it is larger than the sum of its proper divisors (33338357).

216235243 is a wasteful number, since it uses less digits than its factorization.

216235243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305957.

The product of its digits is 8640, while the sum is 28.

The square root of 216235243 is about 14704.9394082397. The cubic root of 216235243 is about 600.2177385662.

Adding to 216235243 its reverse (342532612), we get a palindrome (558767855).

The spelling of 216235243 in words is "two hundred sixteen million, two hundred thirty-five thousand, two hundred forty-three".