115515543 has 32 divisors (see below), whose sum is σ = 181762560. Its totient is φ = 64333440.

The previous prime is 115515541. The next prime is 115515551. The reversal of 115515543 is 345515511.

It is not a de Polignac number, because 115515543 - 2¹ = 115515541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115515543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115515541) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 125238 + ... + 126156.

It is an arithmetic number, because the mean of its divisors is an integer number (5680080).

Almost surely, 2^115515543 is an apocalyptic number.

115515543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

115515543 is a deficient number, since it is larger than the sum of its proper divisors (66247017).

115515543 is a wasteful number, since it uses less digits than its factorization.

115515543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239.

The product of its digits is 7500, while the sum is 30.

The square root of 115515543 is about 10747.8157315801. The cubic root of 115515543 is about 487.0200130355.

The spelling of 115515543 in words is "one hundred fifteen million, five hundred fifteen thousand, five hundred forty-three".