2244821 has 2 divisors, whose sum is σ = 2244822. Its totient is φ = 2244820.

The previous prime is 2244811. The next prime is 2244841. The reversal of 2244821 is 1284422.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2146225 + 98596 = 1465^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2244821 - 2¹⁰ = 2243797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2244811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1122410 + 1122411.

It is an arithmetic number, because the mean of its divisors is an integer number (1122411).

2^2244821 is an apocalyptic number.

It is an amenable number.

2244821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2244821 is an equidigital number, since it uses as much as digits as its factorization.

2244821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 23.

The square root of 2244821 is about 1498.2726721128. The cubic root of 2244821 is about 130.9364530668.

The spelling of 2244821 in words is "two million, two hundred forty-four thousand, eight hundred twenty-one".