51800987333 has 2 divisors, whose sum is σ = 51800987334. Its totient is φ = 51800987332.

The previous prime is 51800987291. The next prime is 51800987369. The reversal of 51800987333 is 33378900815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47802575044 + 3998412289 = 218638^2 + 63233^2 .

It is a cyclic number.

It is not a de Polignac number, because 51800987333 - 2³⁰ = 50727245509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51800987033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25900493666 + 25900493667.

It is an arithmetic number, because the mean of its divisors is an integer number (25900493667).

Almost surely, 2^51800987333 is an apocalyptic number.

It is an amenable number.

51800987333 is a deficient number, since it is larger than the sum of its proper divisors (1).

51800987333 is an equidigital number, since it uses as much as digits as its factorization.

51800987333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 51800987333 in words is "fifty-one billion, eight hundred million, nine hundred eighty-seven thousand, three hundred thirty-three".