115991122 has 12 divisors (see below), whose sum is σ = 188400330. Its totient is φ = 53534208.

The previous prime is 115991111. The next prime is 115991123. The reversal of 115991122 is 221199511.

It can be written as a sum of positive squares in 3 ways, for example, as 80838081 + 35153041 = 8991^2 + 5929^2 .

It is not an unprimeable number, because it can be changed into a prime (115991123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171247 + ... + 171922.

Almost surely, 2^115991122 is an apocalyptic number.

115991122 is a deficient number, since it is larger than the sum of its proper divisors (72409208).

115991122 is a wasteful number, since it uses less digits than its factorization.

115991122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343197 (or 343184 counting only the distinct ones).

The product of its digits is 1620, while the sum is 31.

The square root of 115991122 is about 10769.9174555797. The cubic root of 115991122 is about 487.6874538368.

It can be divided in two parts, 11599 and 1122, that added together give a palindrome (12721).

The spelling of 115991122 in words is "one hundred fifteen million, nine hundred ninety-one thousand, one hundred twenty-two".