51688005 has 32 divisors (see below), whose sum is σ = 88335360. Its totient is φ = 25751040.

The previous prime is 51687997. The next prime is 51688019. The reversal of 51688005 is 50088615.

It is not a de Polignac number, because 51688005 - 2³ = 51687997 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 11569 + ... + 15401.

It is an arithmetic number, because the mean of its divisors is an integer number (2760480).

Almost surely, 2^51688005 is an apocalyptic number.

It is an amenable number.

51688005 is a deficient number, since it is larger than the sum of its proper divisors (36647355).

51688005 is a wasteful number, since it uses less digits than its factorization.

51688005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 51688005 is about 7189.4370433296. The cubic root of 51688005 is about 372.5031274605.

The spelling of 51688005 in words is "fifty-one million, six hundred eighty-eight thousand, five".