51431240244 has 12 divisors (see below), whose sum is σ = 120006227264. Its totient is φ = 17143746744.

The previous prime is 51431240243. The next prime is 51431240249. The reversal of 51431240244 is 44204213415.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431240243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2142968332 + ... + 2142968355.

Almost surely, 2^51431240244 is an apocalyptic number.

It is an amenable number.

51431240244 is an abundant number, since it is smaller than the sum of its proper divisors (68574987020).

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

51431240244 is a wasteful number, since it uses less digits than its factorization.

51431240244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285936694 (or 4285936692 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 51431240244 its reverse (44204213415), we get a palindrome (95635453659).

The spelling of 51431240244 in words is "fifty-one billion, four hundred thirty-one million, two hundred forty thousand, two hundred forty-four".