517990211 has 2 divisors, whose sum is σ = 517990212. Its totient is φ = 517990210.

The previous prime is 517990189. The next prime is 517990219. The reversal of 517990211 is 112099715.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517990211 is a prime.

It is not a weakly prime, because it can be changed into another prime (517990219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258995105 + 258995106.

It is an arithmetic number, because the mean of its divisors is an integer number (258995106).

Almost surely, 2^517990211 is an apocalyptic number.

517990211 is a deficient number, since it is larger than the sum of its proper divisors (1).

517990211 is an equidigital number, since it uses as much as digits as its factorization.

517990211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 517990211 is about 22759.3983004824. The cubic root of 517990211 is about 803.1078128032.

The spelling of 517990211 in words is "five hundred seventeen million, nine hundred ninety thousand, two hundred eleven".