165206215 has 8 divisors (see below), whose sum is σ = 202858128. Its totient is φ = 129091200.

The previous prime is 165206213. The next prime is 165206219. The reversal of 165206215 is 512602561.

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

It is not a de Polignac number, because 165206215 - 2¹ = 165206213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165206213) 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, 383986 + ... + 384415.

It is an arithmetic number, because the mean of its divisors is an integer number (25357266).

Almost surely, 2^165206215 is an apocalyptic number.

165206215 is a deficient number, since it is larger than the sum of its proper divisors (37651913).

165206215 is an equidigital number, since it uses as much as digits as its factorization.

165206215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768449.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 165206215 is about 12853.2569802366. The cubic root of 165206215 is about 548.7090549442.

Adding to 165206215 its reverse (512602561), we get a palindrome (677808776).

The spelling of 165206215 in words is "one hundred sixty-five million, two hundred six thousand, two hundred fifteen".