51431350512 has 40 divisors (see below), whose sum is σ = 132926073040. Its totient is φ = 17135815680.

The previous prime is 51431350507. The next prime is 51431350519. The reversal of 51431350512 is 21505313415.

It is a self number, because there is not a number n which added to its sum of digits gives 51431350512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431350519) 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 in 7 ways as a sum of consecutive naturals, for example, 144187 + ... + 351642.

It is an arithmetic number, because the mean of its divisors is an integer number (3323151826).

Almost surely, 2^51431350512 is an apocalyptic number.

It is an amenable number.

51431350512 is an abundant number, since it is smaller than the sum of its proper divisors (81494722528).

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

51431350512 is a wasteful number, since it uses less digits than its factorization.

51431350512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498001 (or 497995 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 51431350512 its reverse (21505313415), we get a palindrome (72936663927).

The spelling of 51431350512 in words is "fifty-one billion, four hundred thirty-one million, three hundred fifty thousand, five hundred twelve".