51731058315792 has 80 divisors (see below), whose sum is σ = 135589505966208. Its totient is φ = 16992198343680.

The previous prime is 51731058315767. The next prime is 51731058315793. The reversal of 51731058315792 is 29751385013715.

It is a super-2 number, since 2×51731058315792² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51731058315793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2877228 + ... + 10570740.

Almost surely, 2^{51731058315792} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51731058315792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67794752983104).

51731058315792 is an abundant number, since it is smaller than the sum of its proper divisors (83858447650416).

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

51731058315792 is a wasteful number, since it uses less digits than its factorization.

51731058315792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695568 (or 7695562 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 57.

The spelling of 51731058315792 in words is "fifty-one trillion, seven hundred thirty-one billion, fifty-eight million, three hundred fifteen thousand, seven hundred ninety-two".