51000017 has 8 divisors (see below), whose sum is σ = 54078696. Its totient is φ = 47930112.

The previous prime is 50999999. The next prime is 51000041. The reversal of 51000017 is 71000015.

It can be written as a sum of positive squares in 4 ways, for example, as 14409616 + 36590401 = 3796^2 + 6049^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51000017 - 2¹⁸ = 50737873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50999965 and 51000010.

It is not an unprimeable number, because it can be changed into a prime (51030017) 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, 12743 + ... + 16259.

It is an arithmetic number, because the mean of its divisors is an integer number (6759837).

Almost surely, 2^51000017 is an apocalyptic number.

It is an amenable number.

51000017 is a deficient number, since it is larger than the sum of its proper divisors (3078679).

51000017 is a wasteful number, since it uses less digits than its factorization.

51000017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387.

The product of its (nonzero) digits is 35, while the sum is 14.

The square root of 51000017 is about 7141.4296187808. The cubic root of 51000017 is about 370.8430181314.

The spelling of 51000017 in words is "fifty-one million, seventeen", and thus it is an aban number and an uban number.