519254519209 has 2 divisors, whose sum is σ = 519254519210. Its totient is φ = 519254519208.

The previous prime is 519254519207. The next prime is 519254519227. The reversal of 519254519209 is 902915452915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422656014400 + 96598504809 = 650120^2 + 310803^2 .

It is a cyclic number.

It is not a de Polignac number, because 519254519209 - 2¹ = 519254519207 is a prime.

Together with 519254519207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (519254519207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259627259604 + 259627259605.

It is an arithmetic number, because the mean of its divisors is an integer number (259627259605).

Almost surely, 2^519254519209 is an apocalyptic number.

It is an amenable number.

519254519209 is a deficient number, since it is larger than the sum of its proper divisors (1).

519254519209 is an equidigital number, since it uses as much as digits as its factorization.

519254519209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 519254519209 in words is "five hundred nineteen billion, two hundred fifty-four million, five hundred nineteen thousand, two hundred nine".