1155500115 has 128 divisors (see below), whose sum is σ = 2492467200. Its totient is φ = 451584000.

The previous prime is 1155500051. The next prime is 1155500119. The reversal of 1155500115 is 5110055511.

It is not a de Polignac number, because 1155500115 - 2⁶ = 1155500051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155500119) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 961515 + ... + 962715.

It is an arithmetic number, because the mean of its divisors is an integer number (19472400).

Almost surely, 2^1155500115 is an apocalyptic number.

1155500115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155500115 is an abundant number, since it is smaller than the sum of its proper divisors (1336967085).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155500115 is a wasteful number, since it uses less digits than its factorization.

1155500115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 24.

The square root of 1155500115 is about 33992.6479551094. The cubic root of 1155500115 is about 1049.3571620734.

Adding to 1155500115 its reverse (5110055511), we get a palindrome (6265555626).

The spelling of 1155500115 in words is "one billion, one hundred fifty-five million, five hundred thousand, one hundred fifteen".