2219213809 has 2 divisors, whose sum is σ = 2219213810. Its totient is φ = 2219213808.

The previous prime is 2219213803. The next prime is 2219213831. The reversal of 2219213809 is 9083129122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1528575409 + 690638400 = 39097^2 + 26280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2219213809 - 2¹³ = 2219205617 is a prime.

It is not a weakly prime, because it can be changed into another prime (2219213803) 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 as a sum of consecutive naturals, namely, 1109606904 + 1109606905.

It is an arithmetic number, because the mean of its divisors is an integer number (1109606905).

Almost surely, 2^2219213809 is an apocalyptic number.

It is an amenable number.

2219213809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219213809 is an equidigital number, since it uses as much as digits as its factorization.

2219213809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 2219213809 is about 47108.5322314334. The cubic root of 2219213809 is about 1304.3667374730.

The spelling of 2219213809 in words is "two billion, two hundred nineteen million, two hundred thirteen thousand, eight hundred nine".