51156731713 has 2 divisors, whose sum is σ = 51156731714. Its totient is φ = 51156731712.

The previous prime is 51156731669. The next prime is 51156731723. The reversal of 51156731713 is 31713765115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26086126144 + 25070605569 = 161512^2 + 158337^2 .

It is a cyclic number.

It is not a de Polignac number, because 51156731713 - 2³³ = 42566797121 is a prime.

It is a super-2 number, since 2×51156731713² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51156731723) 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, 25578365856 + 25578365857.

It is an arithmetic number, because the mean of its divisors is an integer number (25578365857).

Almost surely, 2^51156731713 is an apocalyptic number.

It is an amenable number.

51156731713 is a deficient number, since it is larger than the sum of its proper divisors (1).

51156731713 is an equidigital number, since it uses as much as digits as its factorization.

51156731713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66150, while the sum is 40.

The spelling of 51156731713 in words is "fifty-one billion, one hundred fifty-six million, seven hundred thirty-one thousand, seven hundred thirteen".