216680243 has 8 divisors (see below), whose sum is σ = 235530288. Its totient is φ = 198141984.

The previous prime is 216680221. The next prime is 216680287. The reversal of 216680243 is 342086612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216680243 - 2⁶ = 216680179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216680543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76496 + ... + 79277.

It is an arithmetic number, because the mean of its divisors is an integer number (29441286).

Almost surely, 2^216680243 is an apocalyptic number.

216680243 is a deficient number, since it is larger than the sum of its proper divisors (18850045).

216680243 is a wasteful number, since it uses less digits than its factorization.

216680243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155893.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 216680243 is about 14720.0626017691. The cubic root of 216680243 is about 600.6291945893.

The spelling of 216680243 in words is "two hundred sixteen million, six hundred eighty thousand, two hundred forty-three".