51081507473 has 2 divisors, whose sum is σ = 51081507474. Its totient is φ = 51081507472.

The previous prime is 51081507457. The next prime is 51081507527. The reversal of 51081507473 is 37470518015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44750440849 + 6331066624 = 211543^2 + 79568^2 .

It is a cyclic number.

It is not a de Polignac number, because 51081507473 - 2⁴ = 51081507457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51081507473.

It is not a weakly prime, because it can be changed into another prime (51081507443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25540753736 + 25540753737.

It is an arithmetic number, because the mean of its divisors is an integer number (25540753737).

Almost surely, 2^51081507473 is an apocalyptic number.

It is an amenable number.

51081507473 is a deficient number, since it is larger than the sum of its proper divisors (1).

51081507473 is an equidigital number, since it uses as much as digits as its factorization.

51081507473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 51081507473 in words is "fifty-one billion, eighty-one million, five hundred seven thousand, four hundred seventy-three".