216118201 has 8 divisors (see below), whose sum is σ = 233060744. Its totient is φ = 199221120.

The previous prime is 216118187. The next prime is 216118213. The reversal of 216118201 is 102811612.

It can be written as a sum of positive squares in 4 ways, for example, as 34515625 + 181602576 = 5875^2 + 13476^2 .

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 216118201 - 2⁹ = 216117689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216118261) 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, 1140 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (29132593).

Almost surely, 2^216118201 is an apocalyptic number.

It is an amenable number.

216118201 is a deficient number, since it is larger than the sum of its proper divisors (16942543).

216118201 is a wasteful number, since it uses less digits than its factorization.

216118201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22731.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 216118201 is about 14700.9591863932. The cubic root of 216118201 is about 600.1094254126.

Adding to 216118201 its reverse (102811612), we get a palindrome (318929813).

The spelling of 216118201 in words is "two hundred sixteen million, one hundred eighteen thousand, two hundred one".