5108821 has 2 divisors, whose sum is σ = 5108822. Its totient is φ = 5108820.

The previous prime is 5108813. The next prime is 5108827. The reversal of 5108821 is 1288015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4901796 + 207025 = 2214^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 5108821 - 2³ = 5108813 is a prime.

It is a super-2 number, since 2×5108821² = 52200104020082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5108827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2554410 + 2554411.

It is an arithmetic number, because the mean of its divisors is an integer number (2554411).

Almost surely, 2^5108821 is an apocalyptic number.

It is an amenable number.

5108821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5108821 is an equidigital number, since it uses as much as digits as its factorization.

5108821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 5108821 is about 2260.2701166011. The cubic root of 5108821 is about 172.2292440811.

It can be divided in two parts, 5108 and 821, that added together give a square (5929 = 77²).

The spelling of 5108821 in words is "five million, one hundred eight thousand, eight hundred twenty-one".