216860187 has 16 divisors (see below), whose sum is σ = 292540160. Its totient is φ = 142884000.

The previous prime is 216860179. The next prime is 216860191. The reversal of 216860187 is 781068612.

216860187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216860187 - 2³ = 216860179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216860107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205812 + ... + 206862.

It is an arithmetic number, because the mean of its divisors is an integer number (18283760).

Almost surely, 2^216860187 is an apocalyptic number.

216860187 is a deficient number, since it is larger than the sum of its proper divisors (75679973).

216860187 is a wasteful number, since it uses less digits than its factorization.

216860187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 216860187 is about 14726.1735355794. The cubic root of 216860187 is about 600.7954145048.

The spelling of 216860187 in words is "two hundred sixteen million, eight hundred sixty thousand, one hundred eighty-seven".