165216326 has 16 divisors (see below), whose sum is σ = 272982528. Its totient is φ = 74368200.

The previous prime is 165216287. The next prime is 165216349. The reversal of 165216326 is 623612561.

It is a junction number, because it is equal to n+sod(n) for n = 165216292 and 165216301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34190 + ... + 38721.

It is an arithmetic number, because the mean of its divisors is an integer number (17061408).

Almost surely, 2^165216326 is an apocalyptic number.

165216326 is a deficient number, since it is larger than the sum of its proper divisors (107766202).

165216326 is a wasteful number, since it uses less digits than its factorization.

165216326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73027.

The product of its digits is 12960, while the sum is 32.

The square root of 165216326 is about 12853.6502986506. The cubic root of 165216326 is about 548.7202488008.

Adding to 165216326 its reverse (623612561), we get a palindrome (788828887).

The spelling of 165216326 in words is "one hundred sixty-five million, two hundred sixteen thousand, three hundred twenty-six".