220518 has 12 divisors (see below), whose sum is σ = 477828. Its totient is φ = 73500.

The previous prime is 220513. The next prime is 220529. The reversal of 220518 is 815022.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12251 = 220518 / (2 + 2 + 0 + 5 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 220518.

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 220518.

It is not an unprimeable number, because it can be changed into a prime (220511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6108 + ... + 6143.

It is an arithmetic number, because the mean of its divisors is an integer number (39819).

2²²⁰⁵¹⁸ is an apocalyptic number.

220518 is an abundant number, since it is smaller than the sum of its proper divisors (257310).

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

220518 is a wasteful number, since it uses less digits than its factorization.

220518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12259 (or 12256 counting only the distinct ones).

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

The square root of 220518 is about 469.5934411808. The cubic root of 220518 is about 60.4154500482.

The spelling of 220518 in words is "two hundred twenty thousand, five hundred eighteen".