115287217 has 8 divisors (see below), whose sum is σ = 122167656. Its totient is φ = 108417792.

The previous prime is 115287197. The next prime is 115287241. The reversal of 115287217 is 712782511.

It can be written as a sum of positive squares in 4 ways, for example, as 5645376 + 109641841 = 2376^2 + 10471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115287217 - 2¹¹ = 115285169 is a prime.

It is a super-2 number, since 2×115287217² = 26582284807210178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115287517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30103 + ... + 33715.

It is an arithmetic number, because the mean of its divisors is an integer number (15270957).

Almost surely, 2^115287217 is an apocalyptic number.

115287217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

115287217 is a deficient number, since it is larger than the sum of its proper divisors (6880439).

115287217 is a wasteful number, since it uses less digits than its factorization.

115287217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507.

The product of its digits is 7840, while the sum is 34.

The square root of 115287217 is about 10737.1885053770. The cubic root of 115287217 is about 486.6989229782.

The spelling of 115287217 in words is "one hundred fifteen million, two hundred eighty-seven thousand, two hundred seventeen".