51231433505140 has 48 divisors (see below), whose sum is σ = 122987270714112. Its totient is φ = 17560515730176.

The previous prime is 51231433505129. The next prime is 51231433505167. The reversal of 51231433505140 is 4150533413215.

It is a self number, because there is not a number n which added to its sum of digits gives 51231433505140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46823769 + ... + 47905408.

It is an arithmetic number, because the mean of its divisors is an integer number (2562234806544).

Almost surely, 2^{51231433505140} is an apocalyptic number.

It is an amenable number.

51231433505140 is an abundant number, since it is smaller than the sum of its proper divisors (71755837208972).

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

51231433505140 is a wasteful number, since it uses less digits than its factorization.

51231433505140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94733056 (or 94733054 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 51231433505140 its reverse (4150533413215), we get a palindrome (55381966918355).

The spelling of 51231433505140 in words is "fifty-one trillion, two hundred thirty-one billion, four hundred thirty-three million, five hundred five thousand, one hundred forty".