513109243 has 2 divisors, whose sum is σ = 513109244. Its totient is φ = 513109242.

The previous prime is 513109171. The next prime is 513109273. The reversal of 513109243 is 342901315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513109243 - 2⁹ = 513108731 is a prime.

It is not a weakly prime, because it can be changed into another prime (513109273) 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, 256554621 + 256554622.

It is an arithmetic number, because the mean of its divisors is an integer number (256554622).

Almost surely, 2^513109243 is an apocalyptic number.

513109243 is a deficient number, since it is larger than the sum of its proper divisors (1).

513109243 is an equidigital number, since it uses as much as digits as its factorization.

513109243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 513109243 is about 22651.9147755769. The cubic root of 513109243 is about 800.5773140146.

The spelling of 513109243 in words is "five hundred thirteen million, one hundred nine thousand, two hundred forty-three".