165131741 has 2 divisors, whose sum is σ = 165131742. Its totient is φ = 165131740.

The previous prime is 165131731. The next prime is 165131749. The reversal of 165131741 is 147131561.

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., 145106116 + 20025625 = 12046^2 + 4475^2 .

It is a cyclic number.

It is not a de Polignac number, because 165131741 - 2⁶ = 165131677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165131749) 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, 82565870 + 82565871.

It is an arithmetic number, because the mean of its divisors is an integer number (82565871).

Almost surely, 2^165131741 is an apocalyptic number.

It is an amenable number.

165131741 is a deficient number, since it is larger than the sum of its proper divisors (1).

165131741 is an equidigital number, since it uses as much as digits as its factorization.

165131741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 29.

The square root of 165131741 is about 12850.3595669538. The cubic root of 165131741 is about 548.6265909356.

The spelling of 165131741 in words is "one hundred sixty-five million, one hundred thirty-one thousand, seven hundred forty-one".