131000042403281 has 2 divisors, whose sum is σ = 131000042403282. Its totient is φ = 131000042403280.

The previous prime is 131000042403133. The next prime is 131000042403299. The reversal of 131000042403281 is 182304240000131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120788694332881 + 10211348070400 = 10990391^2 + 3195520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131000042403281 is a prime.

It is a super-2 number, since 2×131000042403281² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131000042408281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65500021201640 + 65500021201641.

It is an arithmetic number, because the mean of its divisors is an integer number (65500021201641).

Almost surely, 2^{131000042403281} is an apocalyptic number.

It is an amenable number.

131000042403281 is a deficient number, since it is larger than the sum of its proper divisors (1).

131000042403281 is an equidigital number, since it uses as much as digits as its factorization.

131000042403281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 131000042403281 in words is "one hundred thirty-one trillion, forty-two million, four hundred three thousand, two hundred eighty-one".