512665513 has 4 divisors (see below), whose sum is σ = 512720208. Its totient is φ = 512610820.

The previous prime is 512665471. The next prime is 512665529. The reversal of 512665513 is 315566215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 315566215 = 5 ⋅63113243.

It is a cyclic number.

It is not a de Polignac number, because 512665513 - 2²⁵ = 479111081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512665213) 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 in 3 ways as a sum of consecutive naturals, for example, 9331 + ... + 33352.

It is an arithmetic number, because the mean of its divisors is an integer number (128180052).

Almost surely, 2^512665513 is an apocalyptic number.

It is an amenable number.

512665513 is a deficient number, since it is larger than the sum of its proper divisors (54695).

512665513 is a wasteful number, since it uses less digits than its factorization.

512665513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54694.

The product of its digits is 27000, while the sum is 34.

The square root of 512665513 is about 22642.1181208826. The cubic root of 512665513 is about 800.3464712796.

The spelling of 512665513 in words is "five hundred twelve million, six hundred sixty-five thousand, five hundred thirteen".