2219991859 has 4 divisors (see below), whose sum is σ = 2220095920. Its totient is φ = 2219887800.

The previous prime is 2219991833. The next prime is 2219991899. The reversal of 2219991859 is 9581999122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2219991859 - 2⁵ = 2219991827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2219991899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7092 + ... + 67009.

It is an arithmetic number, because the mean of its divisors is an integer number (555023980).

Almost surely, 2^2219991859 is an apocalyptic number.

2219991859 is a deficient number, since it is larger than the sum of its proper divisors (104061).

2219991859 is an equidigital number, since it uses as much as digits as its factorization.

2219991859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104060.

The product of its digits is 1049760, while the sum is 55.

The square root of 2219991859 is about 47116.7895659286. The cubic root of 2219991859 is about 1304.5191554084.

The spelling of 2219991859 in words is "two billion, two hundred nineteen million, nine hundred ninety-one thousand, eight hundred fifty-nine".