5208821 has 2 divisors, whose sum is σ = 5208822. Its totient is φ = 5208820.

The previous prime is 5208809. The next prime is 5208829. The reversal of 5208821 is 1288025.

5208821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3290596 + 1918225 = 1814^2 + 1385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5208821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5208829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2604410 + 2604411.

It is an arithmetic number, because the mean of its divisors is an integer number (2604411).

Almost surely, 2^5208821 is an apocalyptic number.

It is an amenable number.

5208821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5208821 is an equidigital number, since it uses as much as digits as its factorization.

5208821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 5208821 is about 2282.2841628509. The cubic root of 5208821 is about 173.3457284857.

The spelling of 5208821 in words is "five million, two hundred eight thousand, eight hundred twenty-one".