518172 has 24 divisors (see below), whose sum is σ = 1251600. Its totient is φ = 166656.

The previous prime is 518171. The next prime is 518179. The reversal of 518172 is 271815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397 + ... + 1092.

It is an arithmetic number, because the mean of its divisors is an integer number (52150).

2⁵¹⁸¹⁷² is an apocalyptic number.

It is an amenable number.

518172 is an abundant number, since it is smaller than the sum of its proper divisors (733428).

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

518172 is a wasteful number, since it uses less digits than its factorization.

518172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 1523 counting only the distinct ones).

The product of its digits is 560, while the sum is 24.

The square root of 518172 is about 719.8416492535. The cubic root of 518172 is about 80.3201752217.

Adding to 518172 its reverse (271815), we get a palindrome (789987).

It can be divided in two parts, 5181 and 72, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 518172 in words is "five hundred eighteen thousand, one hundred seventy-two".