51451760 has 40 divisors (see below), whose sum is σ = 120327120. Its totient is φ = 20460032.

The previous prime is 51451747. The next prime is 51451769. The reversal of 51451760 is 6715415.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451769) 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 7 ways as a sum of consecutive naturals, for example, 12524 + ... + 16116.

It is an arithmetic number, because the mean of its divisors is an integer number (3008178).

Almost surely, 2^51451760 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 51451760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60163560).

51451760 is an abundant number, since it is smaller than the sum of its proper divisors (68875360).

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

51451760 is a wasteful number, since it uses less digits than its factorization.

51451760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785 (or 3779 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 51451760 is about 7172.9882197031. The cubic root of 51451760 is about 371.9347401612.

The spelling of 51451760 in words is "fifty-one million, four hundred fifty-one thousand, seven hundred sixty".