51512531511 has 16 divisors (see below), whose sum is σ = 82626617600. Its totient is φ = 27886483008.

The previous prime is 51512531501. The next prime is 51512531533. The reversal of 51512531511 is 11513521515.

It is not a de Polignac number, because 51512531511 - 2⁹ = 51512530999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512531501) 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 in 15 ways as a sum of consecutive naturals, for example, 64551646 + ... + 64552443.

It is an arithmetic number, because the mean of its divisors is an integer number (5164163600).

Almost surely, 2^51512531511 is an apocalyptic number.

51512531511 is a deficient number, since it is larger than the sum of its proper divisors (31114086089).

51512531511 is a wasteful number, since it uses less digits than its factorization.

51512531511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129104118.

The product of its digits is 3750, while the sum is 30.

The spelling of 51512531511 in words is "fifty-one billion, five hundred twelve million, five hundred thirty-one thousand, five hundred eleven".