216236243 has 8 divisors (see below), whose sum is σ = 231180768. Its totient is φ = 201538944.

The previous prime is 216236231. The next prime is 216236261. The reversal of 216236243 is 342632612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216236243 - 2¹² = 216232147 is a prime.

It is a super-2 number, since 2×216236243² = 93516225573510098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216236203) 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 7 ways as a sum of consecutive naturals, for example, 59996 + ... + 63497.

It is an arithmetic number, because the mean of its divisors is an integer number (28897596).

Almost surely, 2^216236243 is an apocalyptic number.

216236243 is a deficient number, since it is larger than the sum of its proper divisors (14944525).

216236243 is a wasteful number, since it uses less digits than its factorization.

216236243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123613.

The product of its digits is 10368, while the sum is 29.

The square root of 216236243 is about 14704.9734103806. The cubic root of 216236243 is about 600.2186638191.

Adding to 216236243 its reverse (342632612), we get a palindrome (558868855).

The spelling of 216236243 in words is "two hundred sixteen million, two hundred thirty-six thousand, two hundred forty-three".