165543223 has 8 divisors (see below), whose sum is σ = 171640080. Its totient is φ = 159472320.

The previous prime is 165543211. The next prime is 165543227. The reversal of 165543223 is 322345561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165543223 - 2⁹ = 165542711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165543227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7008 + ... + 19498.

It is an arithmetic number, because the mean of its divisors is an integer number (21455010).

Almost surely, 2^165543223 is an apocalyptic number.

165543223 is a deficient number, since it is larger than the sum of its proper divisors (6096857).

165543223 is a wasteful number, since it uses less digits than its factorization.

165543223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12977.

The product of its digits is 21600, while the sum is 31.

The square root of 165543223 is about 12866.3601302000. The cubic root of 165543223 is about 549.0819096480.

Adding to 165543223 its reverse (322345561), we get a palindrome (487888784).

The spelling of 165543223 in words is "one hundred sixty-five million, five hundred forty-three thousand, two hundred twenty-three".