51865760 has 24 divisors (see below), whose sum is σ = 122533236. Its totient is φ = 20746240.

The previous prime is 51865739. The next prime is 51865813. The reversal of 51865760 is 6756815.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47720464 + 4145296 = 6908^2 + 2036^2 .

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 3 ways as a sum of consecutive naturals, for example, 161921 + ... + 162240.

Almost surely, 2^51865760 is an apocalyptic number.

It is an amenable number.

51865760 is an abundant number, since it is smaller than the sum of its proper divisors (70667476).

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

51865760 is a wasteful number, since it uses less digits than its factorization.

51865760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324176 (or 324168 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 51865760 is about 7201.7886667133. The cubic root of 51865760 is about 372.9296515285.

It can be divided in two parts, 51865 and 760, that added together give a palindrome (52625).

The spelling of 51865760 in words is "fifty-one million, eight hundred sixty-five thousand, seven hundred sixty".