216322543 has 4 divisors (see below), whose sum is σ = 227707960. Its totient is φ = 204937128.

The previous prime is 216322541. The next prime is 216322553. The reversal of 216322543 is 345223612.

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 216322543 - 2¹ = 216322541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216322541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5692680 + ... + 5692717.

It is an arithmetic number, because the mean of its divisors is an integer number (56926990).

Almost surely, 2^216322543 is an apocalyptic number.

216322543 is a deficient number, since it is larger than the sum of its proper divisors (11385417).

216322543 is a wasteful number, since it uses less digits than its factorization.

216322543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11385416.

The product of its digits is 8640, while the sum is 28.

The square root of 216322543 is about 14707.9074990292. The cubic root of 216322543 is about 600.2985023952.

The spelling of 216322543 in words is "two hundred sixteen million, three hundred twenty-two thousand, five hundred forty-three".