2821223 has 4 divisors (see below), whose sum is σ = 2835600. Its totient is φ = 2806848.

The previous prime is 2821183. The next prime is 2821229. The reversal of 2821223 is 3221282.

2821223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2821223 - 2¹² = 2817127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2821195 and 2821204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821229) 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, 6890 + ... + 7287.

It is an arithmetic number, because the mean of its divisors is an integer number (708900).

2^2821223 is an apocalyptic number.

2821223 is a deficient number, since it is larger than the sum of its proper divisors (14377).

2821223 is a wasteful number, since it uses less digits than its factorization.

2821223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14376.

The product of its digits is 384, while the sum is 20.

The square root of 2821223 is about 1679.6496658530. The cubic root of 2821223 is about 141.3011854070.

The spelling of 2821223 in words is "two million, eight hundred twenty-one thousand, two hundred twenty-three".