131165549 has 2 divisors, whose sum is σ = 131165550. Its totient is φ = 131165548.

The previous prime is 131165539. The next prime is 131165623. The reversal of 131165549 is 945561131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103938025 + 27227524 = 10195^2 + 5218^2 .

It is a cyclic number.

It is not a de Polignac number, because 131165549 - 2¹² = 131161453 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 (131165509) 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, 65582774 + 65582775.

It is an arithmetic number, because the mean of its divisors is an integer number (65582775).

Almost surely, 2^131165549 is an apocalyptic number.

It is an amenable number.

131165549 is a deficient number, since it is larger than the sum of its proper divisors (1).

131165549 is an equidigital number, since it uses as much as digits as its factorization.

131165549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 131165549 is about 11452.7529005039. The cubic root of 131165549 is about 508.0891573214.

The spelling of 131165549 in words is "one hundred thirty-one million, one hundred sixty-five thousand, five hundred forty-nine".