51333768 has 96 divisors (see below), whose sum is σ = 145516800. Its totient is φ = 16329600.

The previous prime is 51333739. The next prime is 51333803. The reversal of 51333768 is 86733315.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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, 243183 + ... + 243393.

It is an arithmetic number, because the mean of its divisors is an integer number (1515800).

Almost surely, 2^51333768 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 51333768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72758400).

51333768 is an abundant number, since it is smaller than the sum of its proper divisors (94183032).

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

51333768 is a wasteful number, since it uses less digits than its factorization.

51333768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 356 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 51333768 is about 7164.7587537893. The cubic root of 51333768 is about 371.6502088293.

The spelling of 51333768 in words is "fifty-one million, three hundred thirty-three thousand, seven hundred sixty-eight".