201116171 has 4 divisors (see below), whose sum is σ = 212946552. Its totient is φ = 189285792.

The previous prime is 201116147. The next prime is 201116173. The reversal of 201116171 is 171611102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201116171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201116173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5915165 + ... + 5915198.

It is an arithmetic number, because the mean of its divisors is an integer number (53236638).

Almost surely, 2^201116171 is an apocalyptic number.

201116171 is a deficient number, since it is larger than the sum of its proper divisors (11830381).

201116171 is a wasteful number, since it uses less digits than its factorization.

201116171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11830380.

The product of its (nonzero) digits is 84, while the sum is 20.

The square root of 201116171 is about 14181.5433222199. The cubic root of 201116171 is about 585.8894313553.

Adding to 201116171 its reverse (171611102), we get a palindrome (372727273).

The spelling of 201116171 in words is "two hundred one million, one hundred sixteen thousand, one hundred seventy-one".