51417021751 has 2 divisors, whose sum is σ = 51417021752. Its totient is φ = 51417021750.

The previous prime is 51417021739. The next prime is 51417021787. The reversal of 51417021751 is 15712071415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51417021751 - 2¹⁹ = 51416497463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51417021791) 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, 25708510875 + 25708510876.

It is an arithmetic number, because the mean of its divisors is an integer number (25708510876).

Almost surely, 2^51417021751 is an apocalyptic number.

51417021751 is a deficient number, since it is larger than the sum of its proper divisors (1).

51417021751 is an equidigital number, since it uses as much as digits as its factorization.

51417021751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 51417021751 in words is "fifty-one billion, four hundred seventeen million, twenty-one thousand, seven hundred fifty-one".