51131305744 has 10 divisors (see below), whose sum is σ = 99066904910. Its totient is φ = 25565652864.

The previous prime is 51131305733. The next prime is 51131305793. The reversal of 51131305744 is 44750313115.

It can be written as a sum of positive squares in only one way, i.e., 29821145344 + 21310160400 = 172688^2 + 145980^2 .

It is a super-2 number, since 2×51131305744² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1597853289 + ... + 1597853320.

It is an arithmetic number, because the mean of its divisors is an integer number (9906690491).

Almost surely, 2^51131305744 is an apocalyptic number.

It is an amenable number.

51131305744 is a deficient number, since it is larger than the sum of its proper divisors (47935599166).

51131305744 is a wasteful number, since it uses less digits than its factorization.

51131305744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195706617 (or 3195706611 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 51131305744 its reverse (44750313115), we get a palindrome (95881618859).

The spelling of 51131305744 in words is "fifty-one billion, one hundred thirty-one million, three hundred five thousand, seven hundred forty-four".