2173219019 has 4 divisors (see below), whose sum is σ = 2175866880. Its totient is φ = 2170571160.

The previous prime is 2173219007. The next prime is 2173219033. The reversal of 2173219019 is 9109123712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2173219019 - 2⁴ = 2173219003 is a prime.

It is a super-2 number, since 2×2173219019² = 9445761809086644722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2173219019.

It is not an unprimeable number, because it can be changed into a prime (2173219079) 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, 1322699 + ... + 1324340.

It is an arithmetic number, because the mean of its divisors is an integer number (543966720).

Almost surely, 2^2173219019 is an apocalyptic number.

2173219019 is a deficient number, since it is larger than the sum of its proper divisors (2647861).

2173219019 is an equidigital number, since it uses as much as digits as its factorization.

2173219019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647860.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 2173219019 is about 46617.7972345327. The cubic root of 2173219019 is about 1295.2924447985.

The spelling of 2173219019 in words is "two billion, one hundred seventy-three million, two hundred nineteen thousand, nineteen".