51000717 has 4 divisors (see below), whose sum is σ = 68000960. Its totient is φ = 34000476.

The previous prime is 51000713. The next prime is 51000727. The reversal of 51000717 is 71700015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51000717 - 2² = 51000713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51000693 and 51000702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8500117 + ... + 8500122.

It is an arithmetic number, because the mean of its divisors is an integer number (17000240).

Almost surely, 2^51000717 is an apocalyptic number.

It is an amenable number.

51000717 is a deficient number, since it is larger than the sum of its proper divisors (17000243).

51000717 is a wasteful number, since it uses less digits than its factorization.

51000717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17000242.

The product of its (nonzero) digits is 245, while the sum is 21.

The square root of 51000717 is about 7141.4786284074. The cubic root of 51000717 is about 370.8447147905.

The spelling of 51000717 in words is "fifty-one million, seven hundred seventeen", and thus it is an aban number.