2216399789 has 4 divisors (see below), whose sum is σ = 2276302524. Its totient is φ = 2156497056.

The previous prime is 2216399767. The next prime is 2216399827. The reversal of 2216399789 is 9879936122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1383096100 + 833303689 = 37190^2 + 28867^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216399789 - 2¹² = 2216395693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216399719) 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, 29951312 + ... + 29951385.

It is an arithmetic number, because the mean of its divisors is an integer number (569075631).

Almost surely, 2^2216399789 is an apocalyptic number.

It is an amenable number.

2216399789 is a deficient number, since it is larger than the sum of its proper divisors (59902735).

2216399789 is an equidigital number, since it uses as much as digits as its factorization.

2216399789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59902734.

The product of its digits is 2939328, while the sum is 56.

The square root of 2216399789 is about 47078.6553440091. The cubic root of 2216399789 is about 1303.8151807910.

The spelling of 2216399789 in words is "two billion, two hundred sixteen million, three hundred ninety-nine thousand, seven hundred eighty-nine".