53281536 has 288 divisors, whose sum is σ = 190729728. Its totient is φ = 12779520.

The previous prime is 53281531. The next prime is 53281537. The reversal of 53281536 is 63518235.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 53281497 and 53281506.

It is not an unprimeable number, because it can be changed into a prime (53281531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1005286 + ... + 1005338.

It is an arithmetic number, because the mean of its divisors is an integer number (662256).

Almost surely, 2^53281536 is an apocalyptic number.

53281536 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53281536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95364864).

53281536 is an abundant number, since it is smaller than the sum of its proper divisors (137448192).

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

53281536 is a wasteful number, since it uses less digits than its factorization.

53281536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 93 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 53281536 is about 7299.4202509514. The cubic root of 53281536 is about 376.2925141895.

The spelling of 53281536 in words is "fifty-three million, two hundred eighty-one thousand, five hundred thirty-six".