165304238 has 8 divisors (see below), whose sum is σ = 270497880. Its totient is φ = 75138280.

The previous prime is 165304231. The next prime is 165304241. The reversal of 165304238 is 832403561.

165304238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×165304238² = 54650982201521288, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165304231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3756893 + ... + 3756936.

It is an arithmetic number, because the mean of its divisors is an integer number (33812235).

Almost surely, 2^165304238 is an apocalyptic number.

165304238 is a deficient number, since it is larger than the sum of its proper divisors (105193642).

165304238 is a wasteful number, since it uses less digits than its factorization.

165304238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7513842.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 165304238 is about 12857.0695728070. The cubic root of 165304238 is about 548.8175566601.

Adding to 165304238 its reverse (832403561), we get a palindrome (997707799).

It can be divided in two parts, 165 and 304238, that added together give a palindrome (304403).

The spelling of 165304238 in words is "one hundred sixty-five million, three hundred four thousand, two hundred thirty-eight".