52551220 has 12 divisors (see below), whose sum is σ = 110357604. Its totient is φ = 21020480.

The previous prime is 52551179. The next prime is 52551223. The reversal of 52551220 is 2215525.

52551220 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 2 ways, for example, as 39891856 + 12659364 = 6316^2 + 3558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52551191 and 52551200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52551223) 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 3 ways as a sum of consecutive naturals, for example, 1313761 + ... + 1313800.

It is an arithmetic number, because the mean of its divisors is an integer number (9196467).

Almost surely, 2^52551220 is an apocalyptic number.

It is an amenable number.

52551220 is an abundant number, since it is smaller than the sum of its proper divisors (57806384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52551220 is a wasteful number, since it uses less digits than its factorization.

52551220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627570 (or 2627568 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 52551220 is about 7249.2220272247. Note that the first 3 decimals coincide. The cubic root of 52551220 is about 374.5653512240.

Adding to 52551220 its reverse (2215525), we get a palindrome (54766745).

The spelling of 52551220 in words is "fifty-two million, five hundred fifty-one thousand, two hundred twenty".