165045543 has 16 divisors (see below), whose sum is σ = 237365856. Its totient is φ = 101404800.

The previous prime is 165045527. The next prime is 165045553. The reversal of 165045543 is 345540561.

It is not a de Polignac number, because 165045543 - 2⁴ = 165045527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165045553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24321 + ... + 30357.

It is an arithmetic number, because the mean of its divisors is an integer number (14835366).

Almost surely, 2^165045543 is an apocalyptic number.

165045543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165045543 is a deficient number, since it is larger than the sum of its proper divisors (72320313).

165045543 is a wasteful number, since it uses less digits than its factorization.

165045543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6754.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 165045543 is about 12847.0052152243. The cubic root of 165045543 is about 548.5311141454.

The spelling of 165045543 in words is "one hundred sixty-five million, forty-five thousand, five hundred forty-three".