218450219 has 12 divisors (see below), whose sum is σ = 240397584. Its totient is φ = 197330064.

The previous prime is 218450209. The next prime is 218450261. The reversal of 218450219 is 912054812.

It is a de Polignac number, because none of the positive numbers 2^k-218450219 is a prime.

It is a super-2 number, since 2×218450219² = 95440996362295922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218450209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24914 + ... + 32520.

It is an arithmetic number, because the mean of its divisors is an integer number (20033132).

Almost surely, 2^218450219 is an apocalyptic number.

218450219 is a deficient number, since it is larger than the sum of its proper divisors (21947365).

218450219 is an equidigital number, since it uses as much as digits as its factorization.

218450219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714 (or 7667 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 218450219 is about 14780.0615357312. The cubic root of 218450219 is about 602.2601964587.

The spelling of 218450219 in words is "two hundred eighteen million, four hundred fifty thousand, two hundred nineteen".