51533233481 has 2 divisors, whose sum is σ = 51533233482. Its totient is φ = 51533233480.

The previous prime is 51533233447. The next prime is 51533233517. The reversal of 51533233481 is 18433233515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51465005881 + 68227600 = 226859^2 + 8260^2 .

It is a cyclic number.

It is not a de Polignac number, because 51533233481 - 2³⁰ = 50459491657 is a prime.

It is a super-2 number, since 2×51533233481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51533238481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25766616740 + 25766616741.

It is an arithmetic number, because the mean of its divisors is an integer number (25766616741).

Almost surely, 2^51533233481 is an apocalyptic number.

It is an amenable number.

51533233481 is a deficient number, since it is larger than the sum of its proper divisors (1).

51533233481 is an equidigital number, since it uses as much as digits as its factorization.

51533233481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

Adding to 51533233481 its reverse (18433233515), we get a palindrome (69966466996).

The spelling of 51533233481 in words is "fifty-one billion, five hundred thirty-three million, two hundred thirty-three thousand, four hundred eighty-one".