117155215172 has 12 divisors (see below), whose sum is σ = 206518135740. Its totient is φ = 58150033536.

The previous prime is 117155215127. The next prime is 117155215181. The reversal of 117155215172 is 271512551711.

It can be written as a sum of positive squares in 2 ways, for example, as 39674265856 + 77480949316 = 199184^2 + 278354^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106892897 + ... + 106893992.

It is an arithmetic number, because the mean of its divisors is an integer number (17209844645).

Almost surely, 2^117155215172 is an apocalyptic number.

It is an amenable number.

117155215172 is a deficient number, since it is larger than the sum of its proper divisors (89362920568).

117155215172 is a wasteful number, since it uses less digits than its factorization.

117155215172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213787030 (or 213787028 counting only the distinct ones).

The product of its digits is 24500, while the sum is 38.

Adding to 117155215172 its reverse (271512551711), we get a palindrome (388667766883).

The spelling of 117155215172 in words is "one hundred seventeen billion, one hundred fifty-five million, two hundred fifteen thousand, one hundred seventy-two".