51387500093 has 2 divisors, whose sum is σ = 51387500094. Its totient is φ = 51387500092.

The previous prime is 51387500077. The next prime is 51387500123. The reversal of 51387500093 is 39000578315.

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., 50813274724 + 574225369 = 225418^2 + 23963^2 .

It is a cyclic number.

It is not a de Polignac number, because 51387500093 - 2⁴ = 51387500077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51387500093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51387500033) 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, 25693750046 + 25693750047.

It is an arithmetic number, because the mean of its divisors is an integer number (25693750047).

Almost surely, 2^51387500093 is an apocalyptic number.

It is an amenable number.

51387500093 is a deficient number, since it is larger than the sum of its proper divisors (1).

51387500093 is an equidigital number, since it uses as much as digits as its factorization.

51387500093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 51387500093 in words is "fifty-one billion, three hundred eighty-seven million, five hundred thousand, ninety-three".