505245217 has 2 divisors, whose sum is σ = 505245218. Its totient is φ = 505245216.

The previous prime is 505245203. The next prime is 505245241. The reversal of 505245217 is 712542505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331822656 + 173422561 = 18216^2 + 13169^2 .

It is a cyclic number.

It is not a de Polignac number, because 505245217 - 2⁷ = 505245089 is a prime.

It is not a weakly prime, because it can be changed into another prime (505243217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252622608 + 252622609.

It is an arithmetic number, because the mean of its divisors is an integer number (252622609).

Almost surely, 2^505245217 is an apocalyptic number.

It is an amenable number.

505245217 is a deficient number, since it is larger than the sum of its proper divisors (1).

505245217 is an equidigital number, since it uses as much as digits as its factorization.

505245217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 505245217 is about 22477.6603987159. The cubic root of 505245217 is about 796.4662980241.

The spelling of 505245217 in words is "five hundred five million, two hundred forty-five thousand, two hundred seventeen".