216845849 has 8 divisors (see below), whose sum is σ = 237416448. Its totient is φ = 196418160.

The previous prime is 216845833. The next prime is 216845887. The reversal of 216845849 is 948548612.

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 216845849 - 2⁴ = 216845833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216845249) 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, 32537 + ... + 38630.

It is an arithmetic number, because the mean of its divisors is an integer number (29677056).

Almost surely, 2^216845849 is an apocalyptic number.

It is an amenable number.

216845849 is a deficient number, since it is larger than the sum of its proper divisors (20570599).

216845849 is a wasteful number, since it uses less digits than its factorization.

216845849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71455.

The product of its digits is 552960, while the sum is 47.

The square root of 216845849 is about 14725.6867072473. The cubic root of 216845849 is about 600.7821734167.

The spelling of 216845849 in words is "two hundred sixteen million, eight hundred forty-five thousand, eight hundred forty-nine".