51000065 has 8 divisors (see below), whose sum is σ = 62113920. Its totient is φ = 40190832.

The previous prime is 51000049. The next prime is 51000071. The reversal of 51000065 is 56000015.

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 51000065 - 2⁴ = 51000049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75785 + ... + 76454.

It is an arithmetic number, because the mean of its divisors is an integer number (7764240).

Almost surely, 2^51000065 is an apocalyptic number.

It is an amenable number.

51000065 is a deficient number, since it is larger than the sum of its proper divisors (11113855).

51000065 is a wasteful number, since it uses less digits than its factorization.

51000065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152311.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 51000065 is about 7141.4329794517. The cubic root of 51000065 is about 370.8431344742.

The spelling of 51000065 in words is "fifty-one million, sixty-five", and thus it is an aban number and an uban number.