51355367106181 has 2 divisors, whose sum is σ = 51355367106182. Its totient is φ = 51355367106180.

The previous prime is 51355367106151. The next prime is 51355367106217. The reversal of 51355367106181 is 18160176355315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37447166509281 + 13908200596900 = 6119409^2 + 3729370^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355367106181 - 2³¹ = 51353219622533 is a prime.

It is a super-2 number, since 2×51355367106181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51355367106101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677683553090 + 25677683553091.

It is an arithmetic number, because the mean of its divisors is an integer number (25677683553091).

Almost surely, 2^{51355367106181} is an apocalyptic number.

It is an amenable number.

51355367106181 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355367106181 is an equidigital number, since it uses as much as digits as its factorization.

51355367106181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268000, while the sum is 52.

The spelling of 51355367106181 in words is "fifty-one trillion, three hundred fifty-five billion, three hundred sixty-seven million, one hundred six thousand, one hundred eighty-one".