51731058315737 has 4 divisors (see below), whose sum is σ = 51923367082980. Its totient is φ = 51538749548496.

The previous prime is 51731058315731. The next prime is 51731058315767. The reversal of 51731058315737 is 73751385013715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27690580449856 + 24040477865881 = 5262184^2 + 4903109^2 .

It is a cyclic number.

It is not a de Polignac number, because 51731058315737 - 2¹² = 51731058311641 is a prime.

It is a super-2 number, since 2×51731058315737² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51731058315731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96154383218 + ... + 96154383755.

It is an arithmetic number, because the mean of its divisors is an integer number (12980841770745).

Almost surely, 2^{51731058315737} is an apocalyptic number.

It is an amenable number.

51731058315737 is a deficient number, since it is larger than the sum of its proper divisors (192308767243).

51731058315737 is a wasteful number, since it uses less digits than its factorization.

51731058315737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192308767242.

The product of its (nonzero) digits is 9261000, while the sum is 56.

The spelling of 51731058315737 in words is "fifty-one trillion, seven hundred thirty-one billion, fifty-eight million, three hundred fifteen thousand, seven hundred thirty-seven".