51807756131 has 2 divisors, whose sum is σ = 51807756132. Its totient is φ = 51807756130.

The previous prime is 51807756113. The next prime is 51807756223. The reversal of 51807756131 is 13165770815.

Together with previous prime (51807756113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51807756131 - 2¹⁴ = 51807739747 is a prime.

It is a super-2 number, since 2×51807756131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51807756031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25903878065 + 25903878066.

It is an arithmetic number, because the mean of its divisors is an integer number (25903878066).

Almost surely, 2^51807756131 is an apocalyptic number.

51807756131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51807756131 is an equidigital number, since it uses as much as digits as its factorization.

51807756131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 44.

The spelling of 51807756131 in words is "fifty-one billion, eight hundred seven million, seven hundred fifty-six thousand, one hundred thirty-one".