165204227 has 2 divisors, whose sum is σ = 165204228. Its totient is φ = 165204226.

The previous prime is 165204191. The next prime is 165204253. The reversal of 165204227 is 722402561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165204227 - 2⁶ = 165204163 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165204227.

It is not a weakly prime, because it can be changed into another prime (165204257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82602113 + 82602114.

It is an arithmetic number, because the mean of its divisors is an integer number (82602114).

Almost surely, 2^165204227 is an apocalyptic number.

165204227 is a deficient number, since it is larger than the sum of its proper divisors (1).

165204227 is an equidigital number, since it uses as much as digits as its factorization.

165204227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 165204227 is about 12853.1796455196. The cubic root of 165204227 is about 548.7068539818.

Adding to 165204227 its reverse (722402561), we get a palindrome (887606788).

The spelling of 165204227 in words is "one hundred sixty-five million, two hundred four thousand, two hundred twenty-seven".