2108218171 has 4 divisors (see below), whose sum is σ = 2108402352. Its totient is φ = 2108033992.

The previous prime is 2108218163. The next prime is 2108218183. The reversal of 2108218171 is 1718128012.

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

It is a cyclic number.

It is not a de Polignac number, because 2108218171 - 2³ = 2108218163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2108218141) 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, 73696 + ... + 98221.

It is an arithmetic number, because the mean of its divisors is an integer number (527100588).

Almost surely, 2^2108218171 is an apocalyptic number.

2108218171 is a deficient number, since it is larger than the sum of its proper divisors (184181).

2108218171 is a wasteful number, since it uses less digits than its factorization.

2108218171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184180.

The product of its (nonzero) digits is 1792, while the sum is 31.

The square root of 2108218171 is about 45915.3369910317. The cubic root of 2108218171 is about 1282.2474697562.

The spelling of 2108218171 in words is "two billion, one hundred eight million, two hundred eighteen thousand, one hundred seventy-one".