51127131719 has 2 divisors, whose sum is σ = 51127131720. Its totient is φ = 51127131718.

The previous prime is 51127131683. The next prime is 51127131793. The reversal of 51127131719 is 91713172115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51127131719 - 2⁸ = 51127131463 is a prime.

It is a super-2 number, since 2×51127131719² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51127131799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25563565859 + 25563565860.

It is an arithmetic number, because the mean of its divisors is an integer number (25563565860).

Almost surely, 2^51127131719 is an apocalyptic number.

51127131719 is a deficient number, since it is larger than the sum of its proper divisors (1).

51127131719 is an equidigital number, since it uses as much as digits as its factorization.

51127131719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 38.

The spelling of 51127131719 in words is "fifty-one billion, one hundred twenty-seven million, one hundred thirty-one thousand, seven hundred nineteen".