165112201 has 4 divisors (see below), whose sum is σ = 165950532. Its totient is φ = 164273872.

The previous prime is 165112183. The next prime is 165112229. The reversal of 165112201 is 102211561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 136328976 + 28783225 = 11676^2 + 5365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165112201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165112271) 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, 418870 + ... + 419263.

It is an arithmetic number, because the mean of its divisors is an integer number (41487633).

Almost surely, 2^165112201 is an apocalyptic number.

It is an amenable number.

165112201 is a deficient number, since it is larger than the sum of its proper divisors (838331).

165112201 is an equidigital number, since it uses as much as digits as its factorization.

165112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838330.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 165112201 is about 12849.5992544515. The cubic root of 165112201 is about 548.6049504636.

Adding to 165112201 its reverse (102211561), we get a palindrome (267323762).

The spelling of 165112201 in words is "one hundred sixty-five million, one hundred twelve thousand, two hundred one".