216288843 has 4 divisors (see below), whose sum is σ = 288385128. Its totient is φ = 144192560.

The previous prime is 216288827. The next prime is 216288869. The reversal of 216288843 is 348882612.

It is a happy number.

216288843 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 216288843 - 2⁴ = 216288827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216288795 and 216288804.

It is not an unprimeable number, because it can be changed into a prime (216288823) 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, 36048138 + ... + 36048143.

It is an arithmetic number, because the mean of its divisors is an integer number (72096282).

Almost surely, 2^216288843 is an apocalyptic number.

216288843 is a deficient number, since it is larger than the sum of its proper divisors (72096285).

216288843 is an equidigital number, since it uses as much as digits as its factorization.

216288843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72096284.

The product of its digits is 147456, while the sum is 42.

The square root of 216288843 is about 14706.7618121733. The cubic root of 216288843 is about 600.2673280973.

Subtracting from 216288843 its sum of digits (42), we obtain a triangular number (216288801 = T₂₀₇₉₈).

The spelling of 216288843 in words is "two hundred sixteen million, two hundred eighty-eight thousand, eight hundred forty-three".