51533576261 has 2 divisors, whose sum is σ = 51533576262. Its totient is φ = 51533576260.

The previous prime is 51533576239. The next prime is 51533576323. The reversal of 51533576261 is 16267533515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48723940225 + 2809636036 = 220735^2 + 53006^2 .

It is a cyclic number.

It is not a de Polignac number, because 51533576261 - 2¹⁸ = 51533314117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51533506261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25766788130 + 25766788131.

It is an arithmetic number, because the mean of its divisors is an integer number (25766788131).

Almost surely, 2^51533576261 is an apocalyptic number.

It is an amenable number.

51533576261 is a deficient number, since it is larger than the sum of its proper divisors (1).

51533576261 is an equidigital number, since it uses as much as digits as its factorization.

51533576261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 44.

The spelling of 51533576261 in words is "fifty-one billion, five hundred thirty-three million, five hundred seventy-six thousand, two hundred sixty-one".