2782223 has 4 divisors (see below), whose sum is σ = 2785560. Its totient is φ = 2778888.

The previous prime is 2782217. The next prime is 2782279. The reversal of 2782223 is 3222872.

2782223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 1668²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2782223 - 2⁶ = 2782159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2782192 and 2782201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782123) 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 in 3 ways as a sum of consecutive naturals, for example, 833 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (696390).

2^2782223 is an apocalyptic number.

2782223 is a deficient number, since it is larger than the sum of its proper divisors (3337).

2782223 is a wasteful number, since it uses less digits than its factorization.

2782223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336.

The product of its digits is 2688, while the sum is 26.

The square root of 2782223 is about 1667.9997002398. Note that the first 3 decimals coincide. The cubic root of 2782223 is about 140.6470558327.

The spelling of 2782223 in words is "two million, seven hundred eighty-two thousand, two hundred twenty-three".