52240 has 20 divisors (see below), whose sum is σ = 121644. Its totient is φ = 20864.

The previous prime is 52237. The next prime is 52249. The reversal of 52240 is 4225.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15376 + 36864 = 124^2 + 192^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 52240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247 + ... + 406.

2⁵²²⁴⁰ is an apocalyptic number.

It is an amenable number.

52240 is an abundant number, since it is smaller than the sum of its proper divisors (69404).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60822).

52240 is a wasteful number, since it uses less digits than its factorization.

52240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 52240 is about 228.5607140346. The cubic root of 52240 is about 37.3824466991.

Adding to 52240 its reverse (4225), we get a palindrome (56465).

It can be divided in two parts, 52 and 240, that added together give a palindrome (292).

The spelling of 52240 in words is "fifty-two thousand, two hundred forty".