51997755127 has 2 divisors, whose sum is σ = 51997755128. Its totient is φ = 51997755126.

The previous prime is 51997754999. The next prime is 51997755137. The reversal of 51997755127 is 72155779915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51997755127 - 2⁷ = 51997754999 is a prime.

It is a super-2 number, since 2×51997755127² (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 (51997755137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25998877563 + 25998877564.

It is an arithmetic number, because the mean of its divisors is an integer number (25998877564).

Almost surely, 2^51997755127 is an apocalyptic number.

51997755127 is a deficient number, since it is larger than the sum of its proper divisors (1).

51997755127 is an equidigital number, since it uses as much as digits as its factorization.

51997755127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6945750, while the sum is 58.

The spelling of 51997755127 in words is "fifty-one billion, nine hundred ninety-seven million, seven hundred fifty-five thousand, one hundred twenty-seven".