53281228 has 72 divisors (see below), whose sum is σ = 127494864. Its totient is φ = 19152000.

The previous prime is 53281223. The next prime is 53281279. The reversal of 53281228 is 82218235.

It is a self number, because there is not a number n which added to its sum of digits gives 53281228.

It is not an unprimeable number, because it can be changed into a prime (53281223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27078 + ... + 28978.

It is an arithmetic number, because the mean of its divisors is an integer number (1770762).

Almost surely, 2^53281228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53281228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63747432).

53281228 is an abundant number, since it is smaller than the sum of its proper divisors (74213636).

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

53281228 is a wasteful number, since it uses less digits than its factorization.

53281228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1934 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 53281228 is about 7299.3991533550. The cubic root of 53281228 is about 376.2917891208.

It can be divided in two parts, 5328 and 1228, that added together give a palindrome (6556).

The spelling of 53281228 in words is "fifty-three million, two hundred eighty-one thousand, two hundred twenty-eight".