2219771 has 2 divisors, whose sum is σ = 2219772. Its totient is φ = 2219770.

The previous prime is 2219731. The next prime is 2219773. The reversal of 2219771 is 1779122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2219771 is a prime.

It is a Sophie Germain prime.

Together with 2219773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2219773) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109885 + 1109886.

It is an arithmetic number, because the mean of its divisors is an integer number (1109886).

2^2219771 is an apocalyptic number.

2219771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219771 is an equidigital number, since it uses as much as digits as its factorization.

2219771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 29.

The square root of 2219771 is about 1489.8895932249. The cubic root of 2219771 is about 130.4475893335.

The spelling of 2219771 in words is "two million, two hundred nineteen thousand, seven hundred seventy-one".