2826221 has 4 divisors (see below), whose sum is σ = 2834172. Its totient is φ = 2818272.

The previous prime is 2826211. The next prime is 2826281. The reversal of 2826221 is 1226282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1226282 = 2 ⋅613141.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 2280100 = 739^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 2826221 - 2¹⁴ = 2809837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2826211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3416 + ... + 4161.

It is an arithmetic number, because the mean of its divisors is an integer number (708543).

2^2826221 is an apocalyptic number.

It is an amenable number.

2826221 is a deficient number, since it is larger than the sum of its proper divisors (7951).

2826221 is an equidigital number, since it uses as much as digits as its factorization.

2826221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7950.

The product of its digits is 768, while the sum is 23.

The square root of 2826221 is about 1681.1368177516. The cubic root of 2826221 is about 141.3845779277.

The spelling of 2826221 in words is "two million, eight hundred twenty-six thousand, two hundred twenty-one".