51131305743 has 8 divisors (see below), whose sum is σ = 77914370688. Its totient is φ = 29217888984.

The previous prime is 51131305733. The next prime is 51131305793. The reversal of 51131305743 is 34750313115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51131305743 is a prime.

It is a super-2 number, since 2×51131305743² (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 (51131305723) 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 7 ways as a sum of consecutive naturals, for example, 1217412021 + ... + 1217412062.

It is an arithmetic number, because the mean of its divisors is an integer number (9739296336).

Almost surely, 2^51131305743 is an apocalyptic number.

51131305743 is a deficient number, since it is larger than the sum of its proper divisors (26783064945).

51131305743 is a wasteful number, since it uses less digits than its factorization.

51131305743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434824093.

The product of its (nonzero) digits is 18900, while the sum is 33.

Adding to 51131305743 its reverse (34750313115), we get a palindrome (85881618858).

The spelling of 51131305743 in words is "fifty-one billion, one hundred thirty-one million, three hundred five thousand, seven hundred forty-three".