51533328 has 160 divisors (see below), whose sum is σ = 169132032. Its totient is φ = 13132800.

The previous prime is 51533323. The next prime is 51533329. The reversal of 51533328 is 82333515.

It is a junction number, because it is equal to n+sod(n) for n = 51533295 and 51533304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51533323) 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, 269713 + ... + 269903.

Almost surely, 2^51533328 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 51533328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84566016).

51533328 is an abundant number, since it is smaller than the sum of its proper divisors (117598704).

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

51533328 is a wasteful number, since it uses less digits than its factorization.

51533328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 287 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 51533328 is about 7178.6717434356. The cubic root of 51533328 is about 372.1311827778.

The spelling of 51533328 in words is "fifty-one million, five hundred thirty-three thousand, three hundred twenty-eight".