165128215 has 16 divisors (see below), whose sum is σ = 226713600. Its totient is φ = 113104800.

The previous prime is 165128209. The next prime is 165128273. The reversal of 165128215 is 512821561.

It is not a de Polignac number, because 165128215 - 2⁷ = 165128087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38236 + ... + 42334.

It is an arithmetic number, because the mean of its divisors is an integer number (14169600).

Almost surely, 2^165128215 is an apocalyptic number.

165128215 is a deficient number, since it is larger than the sum of its proper divisors (61585385).

165128215 is a wasteful number, since it uses less digits than its factorization.

165128215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262.

The product of its digits is 4800, while the sum is 31.

The square root of 165128215 is about 12850.2223716168. Note that the first 3 decimals coincide. The cubic root of 165128215 is about 548.6226860309.

Adding to 165128215 its reverse (512821561), we get a palindrome (677949776).

The spelling of 165128215 in words is "one hundred sixty-five million, one hundred twenty-eight thousand, two hundred fifteen".