165104211 has 4 divisors (see below), whose sum is σ = 220138952. Its totient is φ = 110069472.

The previous prime is 165104141. The next prime is 165104213. The reversal of 165104211 is 112401561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112401561 = 3 ⋅37467187.

It is not a de Polignac number, because 165104211 - 2⁷ = 165104083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165104213) 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, 27517366 + ... + 27517371.

It is an arithmetic number, because the mean of its divisors is an integer number (55034738).

Almost surely, 2^165104211 is an apocalyptic number.

165104211 is a deficient number, since it is larger than the sum of its proper divisors (55034741).

165104211 is an equidigital number, since it uses as much as digits as its factorization.

165104211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55034740.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 165104211 is about 12849.2883460525. The cubic root of 165104211 is about 548.5961010787.

Adding to 165104211 its reverse (112401561), we get a palindrome (277505772).

The spelling of 165104211 in words is "one hundred sixty-five million, one hundred four thousand, two hundred eleven".