51305504531 has 2 divisors, whose sum is σ = 51305504532. Its totient is φ = 51305504530.

The previous prime is 51305504443. The next prime is 51305504543. The reversal of 51305504531 is 13540550315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51305504531 - 2¹⁰ = 51305503507 is a prime.

It is a super-2 number, since 2×51305504531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51305504581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25652752265 + 25652752266.

It is an arithmetic number, because the mean of its divisors is an integer number (25652752266).

Almost surely, 2^51305504531 is an apocalyptic number.

51305504531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51305504531 is an equidigital number, since it uses as much as digits as its factorization.

51305504531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 32.

The spelling of 51305504531 in words is "fifty-one billion, three hundred five million, five hundred four thousand, five hundred thirty-one".