6131257722181 has 2 divisors, whose sum is σ = 6131257722182. Its totient is φ = 6131257722180.

The previous prime is 6131257722157. The next prime is 6131257722211. The reversal of 6131257722181 is 1812277521316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4940084116900 + 1191173605281 = 2222630^2 + 1091409^2 .

It is a cyclic number.

It is not a de Polignac number, because 6131257722181 - 2²⁵ = 6131224167749 is a prime.

It is a super-2 number, since 2×6131257722181² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6131254722181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065628861090 + 3065628861091.

It is an arithmetic number, because the mean of its divisors is an integer number (3065628861091).

Almost surely, 2^{6131257722181} is an apocalyptic number.

It is an amenable number.

6131257722181 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131257722181 is an equidigital number, since it uses as much as digits as its factorization.

6131257722181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 46.

The spelling of 6131257722181 in words is "six trillion, one hundred thirty-one billion, two hundred fifty-seven million, seven hundred twenty-two thousand, one hundred eighty-one".