165215326 has 8 divisors (see below), whose sum is σ = 248499360. Its totient is φ = 82382208.

The previous prime is 165215311. The next prime is 165215327. The reversal of 165215326 is 623512561.

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

It is a super-2 number, since 2×165215326² = 54592207890572552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165215327) 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, 111811 + ... + 113278.

It is an arithmetic number, because the mean of its divisors is an integer number (31062420).

Almost surely, 2^165215326 is an apocalyptic number.

165215326 is a deficient number, since it is larger than the sum of its proper divisors (83284034).

165215326 is a wasteful number, since it uses less digits than its factorization.

165215326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225458.

The product of its digits is 10800, while the sum is 31.

The square root of 165215326 is about 12853.6113991360. The cubic root of 165215326 is about 548.7191417243.

Adding to 165215326 its reverse (623512561), we get a palindrome (788727887).

The spelling of 165215326 in words is "one hundred sixty-five million, two hundred fifteen thousand, three hundred twenty-six".