165133543 has 2 divisors, whose sum is σ = 165133544. Its totient is φ = 165133542.

The previous prime is 165133523. The next prime is 165133561. The reversal of 165133543 is 345331561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165133543 - 2²⁵ = 131579111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165133523) 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, 82566771 + 82566772.

It is an arithmetic number, because the mean of its divisors is an integer number (82566772).

Almost surely, 2^165133543 is an apocalyptic number.

165133543 is a deficient number, since it is larger than the sum of its proper divisors (1).

165133543 is an equidigital number, since it uses as much as digits as its factorization.

165133543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 165133543 is about 12850.4296815321. The cubic root of 165133543 is about 548.6285865574.

The spelling of 165133543 in words is "one hundred sixty-five million, one hundred thirty-three thousand, five hundred forty-three".