165411223 has 4 divisors (see below), whose sum is σ = 165450528. Its totient is φ = 165371920.

The previous prime is 165411221. The next prime is 165411269. The reversal of 165411223 is 322114561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165411223 - 2¹ = 165411221 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 (165411221) 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 in 3 ways as a sum of consecutive naturals, for example, 12463 + ... + 22048.

It is an arithmetic number, because the mean of its divisors is an integer number (41362632).

Almost surely, 2^165411223 is an apocalyptic number.

165411223 is a deficient number, since it is larger than the sum of its proper divisors (39305).

165411223 is an equidigital number, since it uses as much as digits as its factorization.

165411223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39304.

The product of its digits is 1440, while the sum is 25.

The square root of 165411223 is about 12861.2294513394. The cubic root of 165411223 is about 548.9359294752.

Adding to 165411223 its reverse (322114561), we get a palindrome (487525784).

The spelling of 165411223 in words is "one hundred sixty-five million, four hundred eleven thousand, two hundred twenty-three".