51731058315793 has 2 divisors, whose sum is σ = 51731058315794. Its totient is φ = 51731058315792.

The previous prime is 51731058315767. The next prime is 51731058315931. The reversal of 51731058315793 is 39751385013715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39251315117569 + 12479743198224 = 6265087^2 + 3532668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51731058315793 is a prime.

It is a super-2 number, since 2×51731058315793² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51731058313793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25865529157896 + 25865529157897.

It is an arithmetic number, because the mean of its divisors is an integer number (25865529157897).

Almost surely, 2^{51731058315793} is an apocalyptic number.

It is an amenable number.

51731058315793 is a deficient number, since it is larger than the sum of its proper divisors (1).

51731058315793 is an equidigital number, since it uses as much as digits as its factorization.

51731058315793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11907000, while the sum is 58.

The spelling of 51731058315793 in words is "fifty-one trillion, seven hundred thirty-one billion, fifty-eight million, three hundred fifteen thousand, seven hundred ninety-three".