51314176681 has 2 divisors, whose sum is σ = 51314176682. Its totient is φ = 51314176680.

The previous prime is 51314176637. The next prime is 51314176723. The reversal of 51314176681 is 18667141315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45974221056 + 5339955625 = 214416^2 + 73075^2 .

It is a cyclic number.

It is not a de Polignac number, because 51314176681 - 2¹³ = 51314168489 is a prime.

It is a super-2 number, since 2×51314176681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51314176601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25657088340 + 25657088341.

It is an arithmetic number, because the mean of its divisors is an integer number (25657088341).

Almost surely, 2^51314176681 is an apocalyptic number.

It is an amenable number.

51314176681 is a deficient number, since it is larger than the sum of its proper divisors (1).

51314176681 is an equidigital number, since it uses as much as digits as its factorization.

51314176681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The spelling of 51314176681 in words is "fifty-one billion, three hundred fourteen million, one hundred seventy-six thousand, six hundred eighty-one".