51227103281 has 2 divisors, whose sum is σ = 51227103282. Its totient is φ = 51227103280.

The previous prime is 51227103223. The next prime is 51227103283. The reversal of 51227103281 is 18230172215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51147893281 + 79210000 = 226159^2 + 8900^2 .

It is a cyclic number.

It is not a de Polignac number, because 51227103281 - 2³⁴ = 34047234097 is a prime.

It is a super-2 number, since 2×51227103281² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 51227103283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51227103283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25613551640 + 25613551641.

It is an arithmetic number, because the mean of its divisors is an integer number (25613551641).

Almost surely, 2^51227103281 is an apocalyptic number.

It is an amenable number.

51227103281 is a deficient number, since it is larger than the sum of its proper divisors (1).

51227103281 is an equidigital number, since it uses as much as digits as its factorization.

51227103281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

Adding to 51227103281 its reverse (18230172215), we get a palindrome (69457275496).

The spelling of 51227103281 in words is "fifty-one billion, two hundred twenty-seven million, one hundred three thousand, two hundred eighty-one".