162021100165 has 4 divisors (see below), whose sum is σ = 194425320204. Its totient is φ = 129616880128.

The previous prime is 162021100091. The next prime is 162021100183. The reversal of 162021100165 is 561001120261.

It is a happy number.

162021100165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561001120261 = 31 ⋅18096810331.

It can be written as a sum of positive squares in 2 ways, for example, as 89423725444 + 72597374721 = 299038^2 + 269439^2 .

It is a cyclic number.

It is not a de Polignac number, because 162021100165 - 2²³ = 162012711557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16202110012 + ... + 16202110021.

It is an arithmetic number, because the mean of its divisors is an integer number (48606330051).

Almost surely, 2^162021100165 is an apocalyptic number.

It is an amenable number.

162021100165 is a deficient number, since it is larger than the sum of its proper divisors (32404220039).

162021100165 is an equidigital number, since it uses as much as digits as its factorization.

162021100165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32404220038.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 162021100165 in words is "one hundred sixty-two billion, twenty-one million, one hundred thousand, one hundred sixty-five".