52581444 has 12 divisors (see below), whose sum is σ = 122690064. Its totient is φ = 17527144.

The previous prime is 52581443. The next prime is 52581457. The reversal of 52581444 is 44418525.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (52581443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2190882 + ... + 2190905.

It is an arithmetic number, because the mean of its divisors is an integer number (10224172).

Almost surely, 2^52581444 is an apocalyptic number.

It is an amenable number.

52581444 is an abundant number, since it is smaller than the sum of its proper divisors (70108620).

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

52581444 is a wasteful number, since it uses less digits than its factorization.

52581444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381794 (or 4381792 counting only the distinct ones).

The product of its digits is 25600, while the sum is 33.

The square root of 52581444 is about 7251.3063650628. The cubic root of 52581444 is about 374.6371459005.

Adding to 52581444 its reverse (44418525), we get a palindrome (96999969).

The spelling of 52581444 in words is "fifty-two million, five hundred eighty-one thousand, four hundred forty-four".