50000000051 has 4 divisors (see below), whose sum is σ = 50031587232. Its totient is φ = 49968412872.

The previous prime is 50000000023. The next prime is 50000000059. The reversal of 50000000051 is 15000000005.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50000000051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50000000059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15791216 + ... + 15794381.

It is an arithmetic number, because the mean of its divisors is an integer number (12507896808).

Almost surely, 2^50000000051 is an apocalyptic number.

50000000051 is a deficient number, since it is larger than the sum of its proper divisors (31587181).

50000000051 is a wasteful number, since it uses less digits than its factorization.

50000000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31587180.

The product of its (nonzero) digits is 25, while the sum is 11.

Adding to 50000000051 its reverse (15000000005), we get a palindrome (65000000056).

The spelling of 50000000051 in words is "fifty billion, fifty-one", and thus it is an aban number and an uban number.