165206323 has 4 divisors (see below), whose sum is σ = 174924360. Its totient is φ = 155488288.

The previous prime is 165206317. The next prime is 165206341. The reversal of 165206323 is 323602561.

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 165206323 - 2⁵ = 165206291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165206291 and 165206300.

It is not an unprimeable number, because it can be changed into a prime (165206303) 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, 4858993 + ... + 4859026.

It is an arithmetic number, because the mean of its divisors is an integer number (43731090).

Almost surely, 2^165206323 is an apocalyptic number.

165206323 is a deficient number, since it is larger than the sum of its proper divisors (9718037).

165206323 is an equidigital number, since it uses as much as digits as its factorization.

165206323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9718036.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 165206323 is about 12853.2611815056. The cubic root of 165206323 is about 548.7091745130.

Adding to 165206323 its reverse (323602561), we get a palindrome (488808884).

The spelling of 165206323 in words is "one hundred sixty-five million, two hundred six thousand, three hundred twenty-three".