216544041347 has 4 divisors (see below), whose sum is σ = 216781741536. Its totient is φ = 216306341160.

The previous prime is 216544041341. The next prime is 216544041359. The reversal of 216544041347 is 743140445612.

216544041347 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 216544041347 - 2⁴ = 216544041331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216544041341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118848728 + ... + 118850549.

It is an arithmetic number, because the mean of its divisors is an integer number (54195435384).

Almost surely, 2^216544041347 is an apocalyptic number.

216544041347 is a deficient number, since it is larger than the sum of its proper divisors (237700189).

216544041347 is an equidigital number, since it uses as much as digits as its factorization.

216544041347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237700188.

The product of its (nonzero) digits is 322560, while the sum is 41.

Adding to 216544041347 its reverse (743140445612), we get a palindrome (959684486959).

The spelling of 216544041347 in words is "two hundred sixteen billion, five hundred forty-four million, forty-one thousand, three hundred forty-seven".