51731105781603 has 16 divisors (see below), whose sum is σ = 69399043773696. Its totient is φ = 34275522964320.

The previous prime is 51731105781569. The next prime is 51731105781623. The reversal of 51731105781603 is 30618750113715.

It is not a de Polignac number, because 51731105781603 - 2⁶ = 51731105781539 is a prime.

It is a super-2 number, since 2×51731105781603² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51731105781623) 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, 28769301 + ... + 30514502.

It is an arithmetic number, because the mean of its divisors is an integer number (4337440235856).

Almost surely, 2^{51731105781603} is an apocalyptic number.

51731105781603 is a deficient number, since it is larger than the sum of its proper divisors (17667937992093).

51731105781603 is a wasteful number, since it uses less digits than its factorization.

51731105781603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59285594.

The product of its (nonzero) digits is 529200, while the sum is 48.

The spelling of 51731105781603 in words is "fifty-one trillion, seven hundred thirty-one billion, one hundred five million, seven hundred eighty-one thousand, six hundred three".