51052020281 has 2 divisors, whose sum is σ = 51052020282. Its totient is φ = 51052020280.

The previous prime is 51052020241. The next prime is 51052020287. The reversal of 51052020281 is 18202025015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43455154681 + 7596865600 = 208459^2 + 87160^2 .

It is a cyclic number.

It is not a de Polignac number, because 51052020281 - 2¹⁴ = 51052003897 is a prime.

It is a super-2 number, since 2×51052020281² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51052020281.

It is not a weakly prime, because it can be changed into another prime (51052020287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25526010140 + 25526010141.

It is an arithmetic number, because the mean of its divisors is an integer number (25526010141).

Almost surely, 2^51052020281 is an apocalyptic number.

It is an amenable number.

51052020281 is a deficient number, since it is larger than the sum of its proper divisors (1).

51052020281 is an equidigital number, since it uses as much as digits as its factorization.

51052020281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 51052020281 its reverse (18202025015), we get a palindrome (69254045296).

The spelling of 51052020281 in words is "fifty-one billion, fifty-two million, twenty thousand, two hundred eighty-one".