2173155115 has 16 divisors (see below), whose sum is σ = 2864390400. Its totient is φ = 1575411552.

The previous prime is 2173155091. The next prime is 2173155133. The reversal of 2173155115 is 5115513712.

2173155115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2173155115 - 2²³ = 2164766507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495105 + ... + 499474.

It is an arithmetic number, because the mean of its divisors is an integer number (179024400).

Almost surely, 2^2173155115 is an apocalyptic number.

2173155115 is a deficient number, since it is larger than the sum of its proper divisors (691235285).

2173155115 is a wasteful number, since it uses less digits than its factorization.

2173155115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994626.

The product of its digits is 5250, while the sum is 31.

The square root of 2173155115 is about 46617.1118260237. Note that the first 3 decimals coincide. The cubic root of 2173155115 is about 1295.2797485509.

Adding to 2173155115 its reverse (5115513712), we get a palindrome (7288668827).

The spelling of 2173155115 in words is "two billion, one hundred seventy-three million, one hundred fifty-five thousand, one hundred fifteen".