115531136 has 32 divisors (see below), whose sum is σ = 263041680. Its totient is φ = 49512960.

The previous prime is 115531121. The next prime is 115531147. The reversal of 115531136 is 631135511.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63575 + ... + 65366.

Almost surely, 2^115531136 is an apocalyptic number.

115531136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

115531136 is an abundant number, since it is smaller than the sum of its proper divisors (147510544).

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

115531136 is an equidigital number, since it uses as much as digits as its factorization.

115531136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128962 (or 128950 counting only the distinct ones).

The product of its digits is 1350, while the sum is 26.

The square root of 115531136 is about 10748.5411103089. The cubic root of 115531136 is about 487.0419257039.

Adding to 115531136 its reverse (631135511), we get a palindrome (746666647).

The spelling of 115531136 in words is "one hundred fifteen million, five hundred thirty-one thousand, one hundred thirty-six".