115431111 has 6 divisors (see below), whose sum is σ = 166733840. Its totient is φ = 76954068.

The previous prime is 115431103. The next prime is 115431143. The reversal of 115431111 is 111134511.

115431111 is a `hidden beast` number, since 11 + 543 + 1 + 111 = 666.

It is not a de Polignac number, because 115431111 - 2³ = 115431103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115431311) 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, 6412831 + ... + 6412848.

Almost surely, 2^115431111 is an apocalyptic number.

115431111 is a deficient number, since it is larger than the sum of its proper divisors (51302729).

115431111 is a wasteful number, since it uses less digits than its factorization.

115431111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12825685 (or 12825682 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 115431111 is about 10743.8871457215. The cubic root of 115431111 is about 486.9013274307.

Adding to 115431111 its reverse (111134511), we get a palindrome (226565622).

The spelling of 115431111 in words is "one hundred fifteen million, four hundred thirty-one thousand, one hundred eleven".