115212287 has 2 divisors, whose sum is σ = 115212288. Its totient is φ = 115212286.

The previous prime is 115212283. The next prime is 115212289. The reversal of 115212287 is 782212511.

It is a strong prime.

It is an emirp because it is prime and its reverse (782212511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115212287 - 2² = 115212283 is a prime.

Together with 115212289, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115212283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57606143 + 57606144.

It is an arithmetic number, because the mean of its divisors is an integer number (57606144).

Almost surely, 2^115212287 is an apocalyptic number.

115212287 is a deficient number, since it is larger than the sum of its proper divisors (1).

115212287 is an equidigital number, since it uses as much as digits as its factorization.

115212287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 29.

The square root of 115212287 is about 10733.6986635549. The cubic root of 115212287 is about 486.5934581086.

Adding to 115212287 its reverse (782212511), we get a palindrome (897424798).

The spelling of 115212287 in words is "one hundred fifteen million, two hundred twelve thousand, two hundred eighty-seven".