16808219 has 4 divisors (see below), whose sum is σ = 16867896. Its totient is φ = 16748544.

The previous prime is 16808213. The next prime is 16808221. The reversal of 16808219 is 91280861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91280861 = 7 ⋅13040123.

It is a cyclic number.

It is not a de Polignac number, because 16808219 - 2²⁰ = 15759643 is a prime.

It is a super-2 number, since 2×16808219² = 565032451903922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16808213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29414 + ... + 29979.

It is an arithmetic number, because the mean of its divisors is an integer number (4216974).

Almost surely, 2^16808219 is an apocalyptic number.

16808219 is a deficient number, since it is larger than the sum of its proper divisors (59677).

16808219 is an equidigital number, since it uses as much as digits as its factorization.

16808219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59676.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 16808219 is about 4099.7827991249. The cubic root of 16808219 is about 256.1575923794.

The spelling of 16808219 in words is "sixteen million, eight hundred eight thousand, two hundred nineteen".