165206227 has 4 divisors (see below), whose sum is σ = 167469400. Its totient is φ = 162943056.

The previous prime is 165206219. The next prime is 165206257. The reversal of 165206227 is 722602561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165206227 - 2³ = 165206219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165206257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131477 + ... + 1131622.

It is an arithmetic number, because the mean of its divisors is an integer number (41867350).

Almost surely, 2^165206227 is an apocalyptic number.

165206227 is a deficient number, since it is larger than the sum of its proper divisors (2263173).

165206227 is an equidigital number, since it uses as much as digits as its factorization.

165206227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263172.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 165206227 is about 12853.2574470443. The cubic root of 165206227 is about 548.7090682296.

Adding to 165206227 its reverse (722602561), we get a palindrome (887808788).

The spelling of 165206227 in words is "one hundred sixty-five million, two hundred six thousand, two hundred twenty-seven".