51000000001 has 16 divisors (see below), whose sum is σ = 53009849088. Its totient is φ = 49034160000.

The previous prime is 50999999957. The next prime is 51000000041. The reversal of 51000000001 is 10000000015.

It is not a de Polignac number, because 51000000001 - 2¹¹ = 50999997953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51000000041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831571 + ... + 890791.

It is an arithmetic number, because the mean of its divisors is an integer number (3313115568).

Almost surely, 2^51000000001 is an apocalyptic number.

It is an amenable number.

51000000001 is a deficient number, since it is larger than the sum of its proper divisors (2009849087).

51000000001 is a wasteful number, since it uses less digits than its factorization.

51000000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59592.

The product of its (nonzero) digits is 5, while the sum is 7.

Adding to 51000000001 its reverse (10000000015), we get a palindrome (61000000016).

It can be divided in two parts, 5 and 1000000001, that multiplied together give a palindrome (5000000005).

The spelling of 51000000001 in words is "fifty-one billion, one", and thus it is an aban number and an uban number.