513020643 has 32 divisors (see below), whose sum is σ = 734576640. Its totient is φ = 317761920.

The previous prime is 513020633. The next prime is 513020647. The reversal of 513020643 is 346020315.

It is a happy number.

It is not a de Polignac number, because 513020643 - 2¹² = 513016547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513020647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 601005 + ... + 601857.

It is an arithmetic number, because the mean of its divisors is an integer number (22955520).

Almost surely, 2^513020643 is an apocalyptic number.

513020643 is a deficient number, since it is larger than the sum of its proper divisors (221555997).

513020643 is a wasteful number, since it uses less digits than its factorization.

513020643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 513020643 is about 22649.9590065854. The cubic root of 513020643 is about 800.5312320584.

Adding to 513020643 its reverse (346020315), we get a palindrome (859040958).

The spelling of 513020643 in words is "five hundred thirteen million, twenty thousand, six hundred forty-three".