51431344493 has 2 divisors, whose sum is σ = 51431344494. Its totient is φ = 51431344492.

The previous prime is 51431344421. The next prime is 51431344529. The reversal of 51431344493 is 39444313415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42907808164 + 8523536329 = 207142^2 + 92323^2 .

It is a cyclic number.

It is not a de Polignac number, because 51431344493 - 2²⁸ = 51162909037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51431344493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51431344403) 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, 25715672246 + 25715672247.

It is an arithmetic number, because the mean of its divisors is an integer number (25715672247).

Almost surely, 2^51431344493 is an apocalyptic number.

It is an amenable number.

51431344493 is a deficient number, since it is larger than the sum of its proper divisors (1).

51431344493 is an equidigital number, since it uses as much as digits as its factorization.

51431344493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 41.

The spelling of 51431344493 in words is "fifty-one billion, four hundred thirty-one million, three hundred forty-four thousand, four hundred ninety-three".