518531130 has 48 divisors (see below), whose sum is σ = 1451890440. Its totient is φ = 127638144.

The previous prime is 518531099. The next prime is 518531173. The reversal of 518531130 is 31135815.

It can be written as a sum of positive squares in 4 ways, for example, as 328008321 + 190522809 = 18111^2 + 13803^2 .

It is a junction number, because it is equal to n+sod(n) for n = 518531094 and 518531103.

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, 220425 + ... + 222764.

Almost surely, 2^518531130 is an apocalyptic number.

518531130 is an abundant number, since it is smaller than the sum of its proper divisors (933359310).

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

518531130 is a wasteful number, since it uses less digits than its factorization.

518531130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443215 (or 443212 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 518531130 is about 22771.2786202268. The cubic root of 518531130 is about 803.3872679861.

Adding to 518531130 its reverse (31135815), we get a palindrome (549666945).

It can be divided in two parts, 5185 and 31130, that added together give a triangular number (36315 = T₂₆₉).

The spelling of 518531130 in words is "five hundred eighteen million, five hundred thirty-one thousand, one hundred thirty".