131140161 has 16 divisors (see below), whose sum is σ = 195048000. Its totient is φ = 87081984.

The previous prime is 131140157. The next prime is 131140169. The reversal of 131140161 is 161041131.

It is not a de Polignac number, because 131140161 - 2² = 131140157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131140169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2511 + ... + 16388.

It is an arithmetic number, because the mean of its divisors is an integer number (12190500).

Almost surely, 2^131140161 is an apocalyptic number.

It is an amenable number.

131140161 is a deficient number, since it is larger than the sum of its proper divisors (63907839).

131140161 is a wasteful number, since it uses less digits than its factorization.

131140161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19165 (or 19159 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 131140161 is about 11451.6444670624. The cubic root of 131140161 is about 508.0563738149.

Adding to 131140161 its reverse (161041131), we get a palindrome (292181292).

The spelling of 131140161 in words is "one hundred thirty-one million, one hundred forty thousand, one hundred sixty-one".