115187287 has 4 divisors (see below), whose sum is σ = 115209640. Its totient is φ = 115164936.

The previous prime is 115187273. The next prime is 115187297. The reversal of 115187287 is 782781511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782781511 = 15289 ⋅51199.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115187287 is a prime.

It is a super-2 number, since 2×115187287² = 26536222172840738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115187207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913 + ... + 15205.

It is an arithmetic number, because the mean of its divisors is an integer number (28802410).

Almost surely, 2^115187287 is an apocalyptic number.

115187287 is a deficient number, since it is larger than the sum of its proper divisors (22353).

115187287 is an equidigital number, since it uses as much as digits as its factorization.

115187287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22352.

The product of its digits is 31360, while the sum is 40.

The square root of 115187287 is about 10732.5340437382. The cubic root of 115187287 is about 486.5582601370.

The spelling of 115187287 in words is "one hundred fifteen million, one hundred eighty-seven thousand, two hundred eighty-seven".