Search a number
-
+
518531130 = 232513443189
BaseRepresentation
bin11110111010000…
…010100000111010
31100010201002222200
4132322002200322
52030220444010
6123241531030
715564304365
oct3672024072
91303632880
10518531130
11246774127
121257a3a76
1383572a70
144cc1b0dc
15307c8cc0
hex1ee8283a

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, 2518531130 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".

Divisors: 1 2 3 5 6 9 10 13 15 18 26 30 39 45 65 78 90 117 130 195 234 390 585 1170 443189 886378 1329567 2215945 2659134 3988701 4431890 5761457 6647835 7977402 11522914 13295670 17284371 19943505 28807285 34568742 39887010 51853113 57614570 86421855 103706226 172843710 259265565 518531130