165213326 has 16 divisors (see below), whose sum is σ = 251781264. Its totient is φ = 81294144.

The previous prime is 165213311. The next prime is 165213329. The reversal of 165213326 is 623312561.

165213326 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165213329) 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, 44186 + ... + 47778.

It is an arithmetic number, because the mean of its divisors is an integer number (15736329).

Almost surely, 2^165213326 is an apocalyptic number.

165213326 is a deficient number, since it is larger than the sum of its proper divisors (86567938).

165213326 is a wasteful number, since it uses less digits than its factorization.

165213326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955.

The product of its digits is 6480, while the sum is 29.

The square root of 165213326 is about 12853.5335997538. The cubic root of 165213326 is about 548.7169275578.

Adding to 165213326 its reverse (623312561), we get a palindrome (788525887).

The spelling of 165213326 in words is "one hundred sixty-five million, two hundred thirteen thousand, three hundred twenty-six".