115819287 has 16 divisors (see below), whose sum is σ = 159344640. Its totient is φ = 74773152.

The previous prime is 115819267. The next prime is 115819289. The reversal of 115819287 is 782918511.

It is not a de Polignac number, because 115819287 - 2⁷ = 115819159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115819289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22414 + ... + 27092.

It is an arithmetic number, because the mean of its divisors is an integer number (9959040).

Almost surely, 2^115819287 is an apocalyptic number.

115819287 is a deficient number, since it is larger than the sum of its proper divisors (43525353).

115819287 is a wasteful number, since it uses less digits than its factorization.

115819287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942.

The product of its digits is 40320, while the sum is 42.

The square root of 115819287 is about 10761.9369539131. The cubic root of 115819287 is about 487.4465066879.

The spelling of 115819287 in words is "one hundred fifteen million, eight hundred nineteen thousand, two hundred eighty-seven".