2644622213 has 2 divisors, whose sum is σ = 2644622214. Its totient is φ = 2644622212.

The previous prime is 2644622209. The next prime is 2644622231. The reversal of 2644622213 is 3122264462.

It is a happy number.

Together with next prime (2644622231) 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., 2412577924 + 232044289 = 49118^2 + 15233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644622213 - 2² = 2644622209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2644622213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2644622203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322311106 + 1322311107.

It is an arithmetic number, because the mean of its divisors is an integer number (1322311107).

Almost surely, 2^2644622213 is an apocalyptic number.

It is an amenable number.

2644622213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644622213 is an equidigital number, since it uses as much as digits as its factorization.

2644622213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 32.

The square root of 2644622213 is about 51425.8904930192. The cubic root of 2644622213 is about 1382.8907779407.

Adding to 2644622213 its reverse (3122264462), we get a palindrome (5766886675).

The spelling of 2644622213 in words is "two billion, six hundred forty-four million, six hundred twenty-two thousand, two hundred thirteen".