51680513 has 8 divisors (see below), whose sum is σ = 54606720. Its totient is φ = 48774960.

The previous prime is 51680477. The next prime is 51680521. The reversal of 51680513 is 31508615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51680513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51680113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131 + ... + 10167.

It is an arithmetic number, because the mean of its divisors is an integer number (6825840).

Almost surely, 2^51680513 is an apocalyptic number.

It is an amenable number.

51680513 is a deficient number, since it is larger than the sum of its proper divisors (2926207).

51680513 is a wasteful number, since it uses less digits than its factorization.

51680513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 51680513 is about 7188.9159822605. The cubic root of 51680513 is about 372.4851289050.

The spelling of 51680513 in words is "fifty-one million, six hundred eighty thousand, five hundred thirteen".