2809219 has 6 divisors (see below), whose sum is σ = 3267924. Its totient is φ = 2407860.

The previous prime is 2809211. The next prime is 2809223. The reversal of 2809219 is 9129082.

It is not a de Polignac number, because 2809219 - 2³ = 2809211 is a prime.

It is a super-2 number, since 2×2809219² = 15783422779922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2809211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28617 + ... + 28714.

It is an arithmetic number, because the mean of its divisors is an integer number (544654).

2^2809219 is an apocalyptic number.

2809219 is a deficient number, since it is larger than the sum of its proper divisors (458705).

2809219 is an equidigital number, since it uses as much as digits as its factorization.

2809219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57345 (or 57338 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2809219 is about 1676.0724924656. The cubic root of 2809219 is about 141.1004933880.

The spelling of 2809219 in words is "two million, eight hundred nine thousand, two hundred nineteen".