520302217 has 2 divisors, whose sum is σ = 520302218. Its totient is φ = 520302216.

The previous prime is 520302199. The next prime is 520302241. The reversal of 520302217 is 712203025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299601481 + 220700736 = 17309^2 + 14856^2 .

It is a cyclic number.

It is not a de Polignac number, because 520302217 - 2⁷ = 520302089 is a prime.

It is not a weakly prime, because it can be changed into another prime (520302287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260151108 + 260151109.

It is an arithmetic number, because the mean of its divisors is an integer number (260151109).

Almost surely, 2^520302217 is an apocalyptic number.

It is an amenable number.

520302217 is a deficient number, since it is larger than the sum of its proper divisors (1).

520302217 is an equidigital number, since it uses as much as digits as its factorization.

520302217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 520302217 is about 22810.1340855331. The cubic root of 520302217 is about 804.3009076597.

The spelling of 520302217 in words is "five hundred twenty million, three hundred two thousand, two hundred seventeen".