518444219 has 4 divisors (see below), whose sum is σ = 540985296. Its totient is φ = 495903144.

The previous prime is 518444207. The next prime is 518444237. The reversal of 518444219 is 912444815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912444815 = 5 ⋅182488963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518444219 is a prime.

It is a super-2 number, since 2×518444219² = 537568816429039922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518444299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11270504 + ... + 11270549.

It is an arithmetic number, because the mean of its divisors is an integer number (135246324).

Almost surely, 2^518444219 is an apocalyptic number.

518444219 is a deficient number, since it is larger than the sum of its proper divisors (22541077).

518444219 is a wasteful number, since it uses less digits than its factorization.

518444219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22541076.

The product of its digits is 46080, while the sum is 38.

The square root of 518444219 is about 22769.3701933101. The cubic root of 518444219 is about 803.3423802329.

The spelling of 518444219 in words is "five hundred eighteen million, four hundred forty-four thousand, two hundred nineteen".