515252009 has 2 divisors, whose sum is σ = 515252010. Its totient is φ = 515252008.

The previous prime is 515251993. The next prime is 515252021. The reversal of 515252009 is 900252515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426835600 + 88416409 = 20660^2 + 9403^2 .

It is a cyclic number.

It is not a de Polignac number, because 515252009 - 2⁴ = 515251993 is a prime.

It is equal to p_27115706 and since 515252009 and 27115706 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (515252039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257626004 + 257626005.

It is an arithmetic number, because the mean of its divisors is an integer number (257626005).

Almost surely, 2^515252009 is an apocalyptic number.

It is an amenable number.

515252009 is a deficient number, since it is larger than the sum of its proper divisors (1).

515252009 is an equidigital number, since it uses as much as digits as its factorization.

515252009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 515252009 is about 22699.1631784081. The cubic root of 515252009 is about 801.6901812818.

The spelling of 515252009 in words is "five hundred fifteen million, two hundred fifty-two thousand, nine".