51374400027281 has 2 divisors, whose sum is σ = 51374400027282. Its totient is φ = 51374400027280.

The previous prime is 51374400027217. The next prime is 51374400027283. The reversal of 51374400027281 is 18272000447315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44522523150400 + 6851876876881 = 6672520^2 + 2617609^2 .

It is a cyclic number.

It is not a de Polignac number, because 51374400027281 - 2⁶ = 51374400027217 is a prime.

It is a super-2 number, since 2×51374400027281² (a number of 28 digits) contains 22 as substring.

Together with 51374400027283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51374400027283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25687200013640 + 25687200013641.

It is an arithmetic number, because the mean of its divisors is an integer number (25687200013641).

Almost surely, 2^{51374400027281} is an apocalyptic number.

It is an amenable number.

51374400027281 is a deficient number, since it is larger than the sum of its proper divisors (1).

51374400027281 is an equidigital number, since it uses as much as digits as its factorization.

51374400027281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 51374400027281 in words is "fifty-one trillion, three hundred seventy-four billion, four hundred million, twenty-seven thousand, two hundred eighty-one".