2721223 has 2 divisors, whose sum is σ = 2721224. Its totient is φ = 2721222.

The previous prime is 2721197. The next prime is 2721227. The reversal of 2721223 is 3221272.

2721223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2721223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2721223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360611 + 1360612.

It is an arithmetic number, because the mean of its divisors is an integer number (1360612).

2^2721223 is an apocalyptic number.

2721223 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721223 is an equidigital number, since it uses as much as digits as its factorization.

2721223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 19.

The square root of 2721223 is about 1649.6129849149. The cubic root of 2721223 is about 139.6115592927.

Adding to 2721223 its reverse (3221272), we get a palindrome (5942495).

The spelling of 2721223 in words is "two million, seven hundred twenty-one thousand, two hundred twenty-three".