219104217 has 8 divisors (see below), whose sum is σ = 324598880. Its totient is φ = 146069460.

The previous prime is 219104213. The next prime is 219104227. The reversal of 219104217 is 712401912.

It is not a de Polignac number, because 219104217 - 2² = 219104213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8114971 = 219104217 / (2 + 1 + 9 + 1 + 0 + 4 + 2 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219104213) 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, 4057459 + ... + 4057512.

It is an arithmetic number, because the mean of its divisors is an integer number (40574860).

Almost surely, 2^219104217 is an apocalyptic number.

219104217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

219104217 is a deficient number, since it is larger than the sum of its proper divisors (105494663).

219104217 is an equidigital number, since it uses as much as digits as its factorization.

219104217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8114980 (or 8114974 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 219104217 is about 14802.1693342564. The cubic root of 219104217 is about 602.8606147969.

The spelling of 219104217 in words is "two hundred nineteen million, one hundred four thousand, two hundred seventeen".