51514868393 has 2 divisors, whose sum is σ = 51514868394. Its totient is φ = 51514868392.

The previous prime is 51514868389. The next prime is 51514868399. The reversal of 51514868393 is 39386841515.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49663459609 + 1851408784 = 222853^2 + 43028^2 .

It is a cyclic number.

It is not a de Polignac number, because 51514868393 - 2² = 51514868389 is a prime.

It is a super-2 number, since 2×51514868393² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51514868399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25757434196 + 25757434197.

It is an arithmetic number, because the mean of its divisors is an integer number (25757434197).

Almost surely, 2^51514868393 is an apocalyptic number.

It is an amenable number.

51514868393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51514868393 is an equidigital number, since it uses as much as digits as its factorization.

51514868393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 53.

The spelling of 51514868393 in words is "fifty-one billion, five hundred fourteen million, eight hundred sixty-eight thousand, three hundred ninety-three".