51127131799 has 2 divisors, whose sum is σ = 51127131800. Its totient is φ = 51127131798.

The previous prime is 51127131793. The next prime is 51127131823. The reversal of 51127131799 is 99713172115.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51127131799 - 2²³ = 51118743191 is a prime.

It is a super-2 number, since 2×51127131799² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51127131793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25563565899 + 25563565900.

It is an arithmetic number, because the mean of its divisors is an integer number (25563565900).

Almost surely, 2^51127131799 is an apocalyptic number.

51127131799 is a deficient number, since it is larger than the sum of its proper divisors (1).

51127131799 is an equidigital number, since it uses as much as digits as its factorization.

51127131799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 46.

The spelling of 51127131799 in words is "fifty-one billion, one hundred twenty-seven million, one hundred thirty-one thousand, seven hundred ninety-nine".