51733440 has 336 divisors, whose sum is σ = 205410816. Its totient is φ = 11827200.

The previous prime is 51733399. The next prime is 51733469. The reversal of 51733440 is 4433715.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 728605 + ... + 728675.

Almost surely, 2^51733440 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 51733440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102705408).

51733440 is an abundant number, since it is smaller than the sum of its proper divisors (153677376).

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

51733440 is a wasteful number, since it uses less digits than its factorization.

51733440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 51733440 is about 7192.5961933088. The cubic root of 51733440 is about 372.6122418991.

The spelling of 51733440 in words is "fifty-one million, seven hundred thirty-three thousand, four hundred forty".