216546347 has 4 divisors (see below), whose sum is σ = 219287520. Its totient is φ = 213805176.

The previous prime is 216546329. The next prime is 216546353. The reversal of 216546347 is 743645612.

It is a happy number.

216546347 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 216546347 - 2⁶ = 216546283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216546347.

It is not an unprimeable number, because it can be changed into a prime (216546247) 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, 1370468 + ... + 1370625.

It is an arithmetic number, because the mean of its divisors is an integer number (54821880).

Almost surely, 2^216546347 is an apocalyptic number.

216546347 is a deficient number, since it is larger than the sum of its proper divisors (2741173).

216546347 is an equidigital number, since it uses as much as digits as its factorization.

216546347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741172.

The product of its digits is 120960, while the sum is 38.

The square root of 216546347 is about 14715.5138204549. The cubic root of 216546347 is about 600.5054509312.

The spelling of 216546347 in words is "two hundred sixteen million, five hundred forty-six thousand, three hundred forty-seven".