505226643156217 has 2 divisors, whose sum is σ = 505226643156218. Its totient is φ = 505226643156216.

The previous prime is 505226643156181. The next prime is 505226643156281. The reversal of 505226643156217 is 712651346622505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490372856964496 + 14853786191721 = 22144364^2 + 3854061^2 .

It is a cyclic number.

It is not a de Polignac number, because 505226643156217 - 2⁷ = 505226643156089 is a prime.

It is not a weakly prime, because it can be changed into another prime (505226643156317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252613321578108 + 252613321578109.

It is an arithmetic number, because the mean of its divisors is an integer number (252613321578109).

Almost surely, 2^{505226643156217} is an apocalyptic number.

It is an amenable number.

505226643156217 is a deficient number, since it is larger than the sum of its proper divisors (1).

505226643156217 is an equidigital number, since it uses as much as digits as its factorization.

505226643156217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 505226643156217 in words is "five hundred five trillion, two hundred twenty-six billion, six hundred forty-three million, one hundred fifty-six thousand, two hundred seventeen".