52108821 has 6 divisors (see below), whose sum is σ = 75268310. Its totient is φ = 34739208.

The previous prime is 52108769. The next prime is 52108831. The reversal of 52108821 is 12880125.

52108821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33524100 + 18584721 = 5790^2 + 4311^2 .

It is not a de Polignac number, because 52108821 - 2²¹ = 50011669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52108831) 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 in 5 ways as a sum of consecutive naturals, for example, 2894926 + ... + 2894943.

Almost surely, 2^52108821 is an apocalyptic number.

It is an amenable number.

52108821 is a deficient number, since it is larger than the sum of its proper divisors (23159489).

52108821 is a wasteful number, since it uses less digits than its factorization.

52108821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789875 (or 5789872 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 52108821 is about 7218.6439862345. The cubic root of 52108821 is about 373.5113032391.

Adding to 52108821 its reverse (12880125), we get a palindrome (64988946).

The spelling of 52108821 in words is "fifty-two million, one hundred eight thousand, eight hundred twenty-one".