216141243 has 4 divisors (see below), whose sum is σ = 288188328. Its totient is φ = 144094160.

The previous prime is 216141241. The next prime is 216141257. The reversal of 216141243 is 342141612.

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 216141243 - 2¹ = 216141241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216141241) 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, 36023538 + ... + 36023543.

It is an arithmetic number, because the mean of its divisors is an integer number (72047082).

Almost surely, 2^216141243 is an apocalyptic number.

216141243 is a deficient number, since it is larger than the sum of its proper divisors (72047085).

216141243 is an equidigital number, since it uses as much as digits as its factorization.

216141243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72047084.

The product of its digits is 1152, while the sum is 24.

The square root of 216141243 is about 14701.7428558658. The cubic root of 216141243 is about 600.1307520600.

Adding to 216141243 its reverse (342141612), we get a palindrome (558282855).

The spelling of 216141243 in words is "two hundred sixteen million, one hundred forty-one thousand, two hundred forty-three".