515155009 has 2 divisors, whose sum is σ = 515155010. Its totient is φ = 515155008.

The previous prime is 515154973. The next prime is 515155049. The reversal of 515155009 is 900551515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271326784 + 243828225 = 16472^2 + 15615^2 .

It is a cyclic number.

It is not a de Polignac number, because 515155009 - 2⁷ = 515154881 is a prime.

It is not a weakly prime, because it can be changed into another prime (515155049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257577504 + 257577505.

It is an arithmetic number, because the mean of its divisors is an integer number (257577505).

Almost surely, 2^515155009 is an apocalyptic number.

It is an amenable number.

515155009 is a deficient number, since it is larger than the sum of its proper divisors (1).

515155009 is an equidigital number, since it uses as much as digits as its factorization.

515155009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5625, while the sum is 31.

The square root of 515155009 is about 22697.0264351963. The cubic root of 515155009 is about 801.6398700900.

The spelling of 515155009 in words is "five hundred fifteen million, one hundred fifty-five thousand, nine".