216852087218 has 16 divisors (see below), whose sum is σ = 358843418136. Its totient is φ = 97644466560.

The previous prime is 216852087217. The next prime is 216852087233. The reversal of 216852087218 is 812780258612.

It can be written as a sum of positive squares in 4 ways, for example, as 34520525209 + 182331562009 = 185797^2 + 427003^2 .

It is not an unprimeable number, because it can be changed into a prime (216852087211) 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, 101711921 + ... + 101714052.

Almost surely, 2^216852087218 is an apocalyptic number.

216852087218 is a deficient number, since it is larger than the sum of its proper divisors (141991330918).

216852087218 is a wasteful number, since it uses less digits than its factorization.

216852087218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203426029.

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 216852087218 in words is "two hundred sixteen billion, eight hundred fifty-two million, eighty-seven thousand, two hundred eighteen".