518540530 has 16 divisors (see below), whose sum is σ = 956138904. Its totient is φ = 202357120.

The previous prime is 518540513. The next prime is 518540551. The reversal of 518540530 is 35045815.

It can be written as a sum of positive squares in 4 ways, for example, as 151856329 + 366684201 = 12323^2 + 19149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 518540492 and 518540501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631957 + ... + 632776.

Almost surely, 2^518540530 is an apocalyptic number.

518540530 is a deficient number, since it is larger than the sum of its proper divisors (437598374).

518540530 is a wasteful number, since it uses less digits than its factorization.

518540530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264781.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 518540530 is about 22771.4850196468. The cubic root of 518540530 is about 803.3921225932.

The spelling of 518540530 in words is "five hundred eighteen million, five hundred forty thousand, five hundred thirty".