513538265 has 4 divisors (see below), whose sum is σ = 616245924. Its totient is φ = 410830608.

The previous prime is 513538247. The next prime is 513538279. The reversal of 513538265 is 562835315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128436889 + 385101376 = 11333^2 + 19624^2 .

It is a cyclic number.

It is not a de Polignac number, because 513538265 - 2¹² = 513534169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 51353822 + ... + 51353831.

It is an arithmetic number, because the mean of its divisors is an integer number (154061481).

Almost surely, 2^513538265 is an apocalyptic number.

It is an amenable number.

513538265 is a deficient number, since it is larger than the sum of its proper divisors (102707659).

513538265 is a wasteful number, since it uses less digits than its factorization.

513538265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102707658.

The product of its digits is 108000, while the sum is 38.

The square root of 513538265 is about 22661.3826806751. The cubic root of 513538265 is about 800.8003786629.

The spelling of 513538265 in words is "five hundred thirteen million, five hundred thirty-eight thousand, two hundred sixty-five".