131544157 has 2 divisors, whose sum is σ = 131544158. Its totient is φ = 131544156.

The previous prime is 131544151. The next prime is 131544167. The reversal of 131544157 is 751445131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80478841 + 51065316 = 8971^2 + 7146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131544157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131544151) 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, 65772078 + 65772079.

It is an arithmetic number, because the mean of its divisors is an integer number (65772079).

Almost surely, 2^131544157 is an apocalyptic number.

It is an amenable number.

131544157 is a deficient number, since it is larger than the sum of its proper divisors (1).

131544157 is an equidigital number, since it uses as much as digits as its factorization.

131544157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 131544157 is about 11469.2701162716. The cubic root of 131544157 is about 508.5775524051.

Adding to 131544157 its reverse (751445131), we get a palindrome (882989288).

The spelling of 131544157 in words is "one hundred thirty-one million, five hundred forty-four thousand, one hundred fifty-seven".