51235427687 has 2 divisors, whose sum is σ = 51235427688. Its totient is φ = 51235427686.

The previous prime is 51235427669. The next prime is 51235427809. The reversal of 51235427687 is 78672453215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51235427687 - 2⁸ = 51235427431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51235427627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617713843 + 25617713844.

It is an arithmetic number, because the mean of its divisors is an integer number (25617713844).

Almost surely, 2^51235427687 is an apocalyptic number.

51235427687 is a deficient number, since it is larger than the sum of its proper divisors (1).

51235427687 is an equidigital number, since it uses as much as digits as its factorization.

51235427687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 50.

The spelling of 51235427687 in words is "fifty-one billion, two hundred thirty-five million, four hundred twenty-seven thousand, six hundred eighty-seven".