518022 has 32 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 168480.

The previous prime is 518017. The next prime is 518047. The reversal of 518022 is 220815.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 517986 and 518004.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 518022.

It is an unprimeable number.

518022 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2772 + ... + 2952.

It is an arithmetic number, because the mean of its divisors is an integer number (36855).

2⁵¹⁸⁰²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 518022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589680).

518022 is an abundant number, since it is smaller than the sum of its proper divisors (661338).

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

518022 is a wasteful number, since it uses less digits than its factorization.

518022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 518022 is about 719.7374521310. The cubic root of 518022 is about 80.3124241345.

Adding to 518022 its reverse (220815), we get a palindrome (738837).

The spelling of 518022 in words is "five hundred eighteen thousand, twenty-two".