515852009 has 2 divisors, whose sum is σ = 515852010. Its totient is φ = 515852008.

The previous prime is 515851993. The next prime is 515852011. The reversal of 515852009 is 900258515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441840400 + 74011609 = 21020^2 + 8603^2 .

It is a cyclic number.

It is not a de Polignac number, because 515852009 - 2⁴ = 515851993 is a prime.

It is a super-2 number, since 2×515852009² = 532206590378672162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 515852011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 515852009.

It is not a weakly prime, because it can be changed into another prime (515852069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257926004 + 257926005.

It is an arithmetic number, because the mean of its divisors is an integer number (257926005).

Almost surely, 2^515852009 is an apocalyptic number.

It is an amenable number.

515852009 is a deficient number, since it is larger than the sum of its proper divisors (1).

515852009 is an equidigital number, since it uses as much as digits as its factorization.

515852009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 515852009 is about 22712.3756793516. The cubic root of 515852009 is about 802.0012442897.

The spelling of 515852009 in words is "five hundred fifteen million, eight hundred fifty-two thousand, nine".