165243163 has 4 divisors (see below), whose sum is σ = 165871728. Its totient is φ = 164614600.

The previous prime is 165243157. The next prime is 165243167. The reversal of 165243163 is 361342561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361342561 = 4723 ⋅76507.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165243163 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165243167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313888 + ... + 314413.

It is an arithmetic number, because the mean of its divisors is an integer number (41467932).

Almost surely, 2^165243163 is an apocalyptic number.

165243163 is a deficient number, since it is larger than the sum of its proper divisors (628565).

165243163 is an equidigital number, since it uses as much as digits as its factorization.

165243163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628564.

The product of its digits is 12960, while the sum is 31.

The square root of 165243163 is about 12854.6942009524. The cubic root of 165243163 is about 548.7499577455.

The spelling of 165243163 in words is "one hundred sixty-five million, two hundred forty-three thousand, one hundred sixty-three".