3227821 has 2 divisors, whose sum is σ = 3227822. Its totient is φ = 3227820.

The previous prime is 3227803. The next prime is 3227827. The reversal of 3227821 is 1287223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3189796 + 38025 = 1786^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 3227821 - 2⁵ = 3227789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3227827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1613910 + 1613911.

It is an arithmetic number, because the mean of its divisors is an integer number (1613911).

Almost surely, 2^3227821 is an apocalyptic number.

It is an amenable number.

3227821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3227821 is an equidigital number, since it uses as much as digits as its factorization.

3227821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 3227821 is about 1796.6137592705. The cubic root of 3227821 is about 147.7870842731.

The spelling of 3227821 in words is "three million, two hundred twenty-seven thousand, eight hundred twenty-one".