115550523021217 has 2 divisors, whose sum is σ = 115550523021218. Its totient is φ = 115550523021216.

The previous prime is 115550523021161. The next prime is 115550523021247. The reversal of 115550523021217 is 712120325055511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112229530696336 + 3320992324881 = 10593844^2 + 1822359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115550523021217 is a prime.

It is a super-2 number, since 2×115550523021217² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115550523021217.

It is not a weakly prime, because it can be changed into another prime (115550523021247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57775261510608 + 57775261510609.

It is an arithmetic number, because the mean of its divisors is an integer number (57775261510609).

Almost surely, 2^{115550523021217} is an apocalyptic number.

It is an amenable number.

115550523021217 is a deficient number, since it is larger than the sum of its proper divisors (1).

115550523021217 is an equidigital number, since it uses as much as digits as its factorization.

115550523021217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105000, while the sum is 40.

Adding to 115550523021217 its reverse (712120325055511), we get a palindrome (827670848076728).

The spelling of 115550523021217 in words is "one hundred fifteen trillion, five hundred fifty billion, five hundred twenty-three million, twenty-one thousand, two hundred seventeen".