2101615171 has 4 divisors (see below), whose sum is σ = 2122423344. Its totient is φ = 2080807000.

The previous prime is 2101615163. The next prime is 2101615189. The reversal of 2101615171 is 1715161012.

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 2101615171 - 2³ = 2101615163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101615111) 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, 10403935 + ... + 10404136.

It is an arithmetic number, because the mean of its divisors is an integer number (530605836).

Almost surely, 2^2101615171 is an apocalyptic number.

2101615171 is a deficient number, since it is larger than the sum of its proper divisors (20808173).

2101615171 is a wasteful number, since it uses less digits than its factorization.

2101615171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20808172.

The product of its (nonzero) digits is 420, while the sum is 25.

The square root of 2101615171 is about 45843.3765226777. The cubic root of 2101615171 is about 1280.9073910637.

Adding to 2101615171 its reverse (1715161012), we get a palindrome (3816776183).

The spelling of 2101615171 in words is "two billion, one hundred one million, six hundred fifteen thousand, one hundred seventy-one".