51715479251281 has 2 divisors, whose sum is σ = 51715479251282. Its totient is φ = 51715479251280.

The previous prime is 51715479251213. The next prime is 51715479251329. The reversal of 51715479251281 is 18215297451715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30249076007056 + 21466403244225 = 5499916^2 + 4633185^2 .

It is a cyclic number.

It is not a de Polignac number, because 51715479251281 - 2⁴¹ = 49516455995729 is a prime.

It is a super-2 number, since 2×51715479251281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51715479251881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25857739625640 + 25857739625641.

It is an arithmetic number, because the mean of its divisors is an integer number (25857739625641).

Almost surely, 2^{51715479251281} is an apocalyptic number.

It is an amenable number.

51715479251281 is a deficient number, since it is larger than the sum of its proper divisors (1).

51715479251281 is an equidigital number, since it uses as much as digits as its factorization.

51715479251281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056000, while the sum is 58.

The spelling of 51715479251281 in words is "fifty-one trillion, seven hundred fifteen billion, four hundred seventy-nine million, two hundred fifty-one thousand, two hundred eighty-one".