2823221 has 2 divisors, whose sum is σ = 2823222. Its totient is φ = 2823220.

The previous prime is 2823217. The next prime is 2823269. The reversal of 2823221 is 1223282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2686321 + 136900 = 1639^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 2823221 - 2² = 2823217 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2823193 and 2823202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2823521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1411610 + 1411611.

It is an arithmetic number, because the mean of its divisors is an integer number (1411611).

2^2823221 is an apocalyptic number.

It is an amenable number.

2823221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2823221 is an equidigital number, since it uses as much as digits as its factorization.

2823221 is an evil number, because the sum of its binary digits is even.

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

The square root of 2823221 is about 1680.2443274715. The cubic root of 2823221 is about 141.3345342003.

The spelling of 2823221 in words is "two million, eight hundred twenty-three thousand, two hundred twenty-one".