51311484517 has 2 divisors, whose sum is σ = 51311484518. Its totient is φ = 51311484516.

The previous prime is 51311484503. The next prime is 51311484527. The reversal of 51311484517 is 71548411315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50092706596 + 1218777921 = 223814^2 + 34911^2 .

It is a cyclic number.

It is not a de Polignac number, because 51311484517 - 2¹⁹ = 51310960229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51311484517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51311484527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25655742258 + 25655742259.

It is an arithmetic number, because the mean of its divisors is an integer number (25655742259).

Almost surely, 2^51311484517 is an apocalyptic number.

It is an amenable number.

51311484517 is a deficient number, since it is larger than the sum of its proper divisors (1).

51311484517 is an equidigital number, since it uses as much as digits as its factorization.

51311484517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The spelling of 51311484517 in words is "fifty-one billion, three hundred eleven million, four hundred eighty-four thousand, five hundred seventeen".