115031287 has 4 divisors (see below), whose sum is σ = 131464336. Its totient is φ = 98598240.

The previous prime is 115031251. The next prime is 115031291. The reversal of 115031287 is 782130511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115031287 - 2⁷ = 115031159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115031227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8216514 + ... + 8216527.

It is an arithmetic number, because the mean of its divisors is an integer number (32866084).

Almost surely, 2^115031287 is an apocalyptic number.

115031287 is a deficient number, since it is larger than the sum of its proper divisors (16433049).

115031287 is an equidigital number, since it uses as much as digits as its factorization.

115031287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16433048.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 115031287 is about 10725.2639594557. The cubic root of 115031287 is about 486.3385096710.

Adding to 115031287 its reverse (782130511), we get a palindrome (897161798).

The spelling of 115031287 in words is "one hundred fifteen million, thirty-one thousand, two hundred eighty-seven".