131000161 has 2 divisors, whose sum is σ = 131000162. Its totient is φ = 131000160.

The previous prime is 131000087. The next prime is 131000189. The reversal of 131000161 is 161000131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 62110161 = 8300^2 + 7881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131000161 is a prime.

It is a super-2 number, since 2×131000161² = 34322084364051842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131007161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65500080 + 65500081.

It is an arithmetic number, because the mean of its divisors is an integer number (65500081).

Almost surely, 2^131000161 is an apocalyptic number.

It is an amenable number.

131000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

131000161 is an equidigital number, since it uses as much as digits as its factorization.

131000161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 131000161 is about 11445.5301755751. The cubic root of 131000161 is about 507.8755158741.

Adding to 131000161 its reverse (161000131), we get a palindrome (292000292).

The spelling of 131000161 in words is "one hundred thirty-one million, one hundred sixty-one", and thus it is an aban number.