505087217 has 2 divisors, whose sum is σ = 505087218. Its totient is φ = 505087216.

The previous prime is 505087213. The next prime is 505087223. The reversal of 505087217 is 712780505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504945841 + 141376 = 22471^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 505087217 - 2² = 505087213 is a prime.

It is a super-2 number, since 2×505087217² = 510226193553610178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505087213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252543608 + 252543609.

It is an arithmetic number, because the mean of its divisors is an integer number (252543609).

Almost surely, 2^505087217 is an apocalyptic number.

It is an amenable number.

505087217 is a deficient number, since it is larger than the sum of its proper divisors (1).

505087217 is an equidigital number, since it uses as much as digits as its factorization.

505087217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 505087217 is about 22474.1455232451. The cubic root of 505087217 is about 796.3832658707.

The spelling of 505087217 in words is "five hundred five million, eighty-seven thousand, two hundred seventeen".