51731322705 has 40 divisors (see below), whose sum is σ = 97613894400. Its totient is φ = 26137927584.

The previous prime is 51731322703. The next prime is 51731322823. The reversal of 51731322705 is 50722313715.

It is a happy number.

51731322705 is a `hidden beast` number, since 517 + 3 + 132 + 2 + 7 + 0 + 5 = 666.

51731322705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51731322705 - 2¹ = 51731322703 is a prime.

It is a super-2 number, since 2×51731322705² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51731322705.

It is not an unprimeable number, because it can be changed into a prime (51731322703) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3353665 + ... + 3369054.

It is an arithmetic number, because the mean of its divisors is an integer number (2440347360).

Almost surely, 2^51731322705 is an apocalyptic number.

It is an amenable number.

51731322705 is a deficient number, since it is larger than the sum of its proper divisors (45882571695).

51731322705 is a wasteful number, since it uses less digits than its factorization.

51731322705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722755 (or 6722746 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The spelling of 51731322705 in words is "fifty-one billion, seven hundred thirty-one million, three hundred twenty-two thousand, seven hundred five".