162128201 has 4 divisors (see below), whose sum is σ = 171665172. Its totient is φ = 152591232.

The previous prime is 162128177. The next prime is 162128209. The reversal of 162128201 is 102821261.

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 118831801 + 43296400 = 10901^2 + 6580^2 .

It is a cyclic number.

It is not a de Polignac number, because 162128201 - 2⁶ = 162128137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (162128209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4768460 + ... + 4768493.

It is an arithmetic number, because the mean of its divisors is an integer number (42916293).

Almost surely, 2^162128201 is an apocalyptic number.

It is an amenable number.

162128201 is a deficient number, since it is larger than the sum of its proper divisors (9536971).

162128201 is an equidigital number, since it uses as much as digits as its factorization.

162128201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536970.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 162128201 is about 12732.9572762968. The cubic root of 162128201 is about 545.2799403515.

Adding to 162128201 its reverse (102821261), we get a palindrome (264949462).

The spelling of 162128201 in words is "one hundred sixty-two million, one hundred twenty-eight thousand, two hundred one".