513136643 has 8 divisors (see below), whose sum is σ = 531889200. Its totient is φ = 494454688.

The previous prime is 513136633. The next prime is 513136649. The reversal of 513136643 is 346631315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 513136643 - 2¹⁸ = 512874499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513136649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2621 + ... + 32142.

It is an arithmetic number, because the mean of its divisors is an integer number (66486150).

Almost surely, 2^513136643 is an apocalyptic number.

513136643 is a deficient number, since it is larger than the sum of its proper divisors (18752557).

513136643 is a wasteful number, since it uses less digits than its factorization.

513136643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35301.

The product of its digits is 19440, while the sum is 32.

The square root of 513136643 is about 22652.5195728864. The cubic root of 513136643 is about 800.5915640197.

Adding to 513136643 its reverse (346631315), we get a palindrome (859767958).

The spelling of 513136643 in words is "five hundred thirteen million, one hundred thirty-six thousand, six hundred forty-three".