513640530 has 48 divisors (see below), whose sum is σ = 1438196760. Its totient is φ = 126434304.

The previous prime is 513640529. The next prime is 513640571. The reversal of 513640530 is 35046315.

513640530 is a `hidden beast` number, since 5 + 13 + 640 + 5 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 129754881 + 383885649 = 11391^2 + 19593^2 .

It is a junction number, because it is equal to n+sod(n) for n = 513640494 and 513640503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218335 + ... + 220674.

Almost surely, 2^513640530 is an apocalyptic number.

513640530 is an abundant number, since it is smaller than the sum of its proper divisors (924556230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513640530 is a wasteful number, since it uses less digits than its factorization.

513640530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439035 (or 439032 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 513640530 is about 22663.6389399408. The cubic root of 513640530 is about 800.8535317389.

Adding to 513640530 its reverse (35046315), we get a palindrome (548686845).

The spelling of 513640530 in words is "five hundred thirteen million, six hundred forty thousand, five hundred thirty".