2219316809 has 4 divisors (see below), whose sum is σ = 2219433216. Its totient is φ = 2219200404.

The previous prime is 2219316787. The next prime is 2219316871. The reversal of 2219316809 is 9086139122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2219316809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2269316809) 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, 22169 + ... + 70214.

It is an arithmetic number, because the mean of its divisors is an integer number (554858304).

Almost surely, 2^2219316809 is an apocalyptic number.

It is an amenable number.

2219316809 is a deficient number, since it is larger than the sum of its proper divisors (116407).

2219316809 is an equidigital number, since it uses as much as digits as its factorization.

2219316809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116406.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 2219316809 is about 47109.6254389695. The cubic root of 2219316809 is about 1304.3869169460.

The spelling of 2219316809 in words is "two billion, two hundred nineteen million, three hundred sixteen thousand, eight hundred nine".