51317843267 has 2 divisors, whose sum is σ = 51317843268. Its totient is φ = 51317843266.

The previous prime is 51317843243. The next prime is 51317843281. The reversal of 51317843267 is 76234871315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51317843267 is a prime.

It is not a weakly prime, because it can be changed into another prime (51317840267) 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, 25658921633 + 25658921634.

It is an arithmetic number, because the mean of its divisors is an integer number (25658921634).

Almost surely, 2^51317843267 is an apocalyptic number.

51317843267 is a deficient number, since it is larger than the sum of its proper divisors (1).

51317843267 is an equidigital number, since it uses as much as digits as its factorization.

51317843267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The spelling of 51317843267 in words is "fifty-one billion, three hundred seventeen million, eight hundred forty-three thousand, two hundred sixty-seven".