2162171115 has 24 divisors (see below), whose sum is σ = 4036053840. Its totient is φ = 1064453184.

The previous prime is 2162171111. The next prime is 2162171119. The reversal of 2162171115 is 5111712612.

2162171115 is a `hidden beast` number, since 21 + 621 + 7 + 1 + 1 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (2162171111) and next prime (2162171119).

It is not a de Polignac number, because 2162171115 - 2² = 2162171111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2162171111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1847425 + ... + 1848594.

It is an arithmetic number, because the mean of its divisors is an integer number (168168910).

Almost surely, 2^2162171115 is an apocalyptic number.

2162171115 is a deficient number, since it is larger than the sum of its proper divisors (1873882725).

2162171115 is a wasteful number, since it uses less digits than its factorization.

2162171115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696043 (or 3696040 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 2162171115 is about 46499.1517664570. The cubic root of 2162171115 is about 1293.0937731995.

Adding to 2162171115 its reverse (5111712612), we get a palindrome (7273883727).

The spelling of 2162171115 in words is "two billion, one hundred sixty-two million, one hundred seventy-one thousand, one hundred fifteen".