2219813 has 2 divisors, whose sum is σ = 2219814. Its totient is φ = 2219812.

The previous prime is 2219807. The next prime is 2219831. The reversal of 2219813 is 3189122.

Together with next prime (2219831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2137444 + 82369 = 1462^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 2219813 - 2⁴ = 2219797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2219213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109906 + 1109907.

It is an arithmetic number, because the mean of its divisors is an integer number (1109907).

2^2219813 is an apocalyptic number.

It is an amenable number.

2219813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219813 is an equidigital number, since it uses as much as digits as its factorization.

2219813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 2219813 is about 1489.9036881624. The cubic root of 2219813 is about 130.4484120556.

The spelling of 2219813 in words is "two million, two hundred nineteen thousand, eight hundred thirteen".