513043321 has 24 divisors (see below), whose sum is σ = 616835520. Its totient is φ = 417507552.

The previous prime is 513043319. The next prime is 513043361. The reversal of 513043321 is 123340315.

It is not a de Polignac number, because 513043321 - 2¹ = 513043319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513043292 and 513043301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513043361) 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 23 ways as a sum of consecutive naturals, for example, 910986 + ... + 911548.

It is an arithmetic number, because the mean of its divisors is an integer number (25701480).

Almost surely, 2^513043321 is an apocalyptic number.

It is an amenable number.

513043321 is a deficient number, since it is larger than the sum of its proper divisors (103792199).

513043321 is an equidigital number, since it uses as much as digits as its factorization.

513043321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 513043321 is about 22650.4596200607. The cubic root of 513043321 is about 800.5430276720.

Adding to 513043321 its reverse (123340315), we get a palindrome (636383636).

The spelling of 513043321 in words is "five hundred thirteen million, forty-three thousand, three hundred twenty-one".