115531155 has 24 divisors (see below), whose sum is σ = 200820048. Its totient is φ = 61442496.

The previous prime is 115531147. The next prime is 115531177. The reversal of 115531155 is 551135511.

115531155 is a `hidden beast` number, since 115 + 531 + 15 + 5 = 666.

It is not a de Polignac number, because 115531155 - 2³ = 115531147 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13344 + ... + 20226.

It is an arithmetic number, because the mean of its divisors is an integer number (8367502).

Almost surely, 2^115531155 is an apocalyptic number.

115531155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115531155 is a deficient number, since it is larger than the sum of its proper divisors (85288893).

115531155 is a wasteful number, since it uses less digits than its factorization.

115531155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7267 (or 7264 counting only the distinct ones).

The product of its digits is 1875, while the sum is 27.

The square root of 115531155 is about 10748.5419941497. The cubic root of 115531155 is about 487.0419524032.

Adding to 115531155 its reverse (551135511), we get a palindrome (666666666).

The spelling of 115531155 in words is "one hundred fifteen million, five hundred thirty-one thousand, one hundred fifty-five".