51431104512 has 84 divisors (see below), whose sum is σ = 148569890820. Its totient is φ = 17143676928.

The previous prime is 51431104507. The next prime is 51431104519. The reversal of 51431104512 is 21540113415.

51431104512 is a `hidden beast` number, since 5 + 1 + 43 + 1 + 104 + 512 = 666.

It is a super-2 number, since 2×51431104512² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431104519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275062 + ... + 422517.

Almost surely, 2^51431104512 is an apocalyptic number.

It is an amenable number.

51431104512 is an abundant number, since it is smaller than the sum of its proper divisors (97138786308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51431104512 is an equidigital number, since it uses as much as digits as its factorization.

51431104512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697611 (or 697584 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 51431104512 its reverse (21540113415), we get a palindrome (72971217927).

The spelling of 51431104512 in words is "fifty-one billion, four hundred thirty-one million, one hundred four thousand, five hundred twelve".