162021161 has 2 divisors, whose sum is σ = 162021162. Its totient is φ = 162021160.

The previous prime is 162021157. The next prime is 162021199. The reversal of 162021161 is 161120261.

162021161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130873600 + 31147561 = 11440^2 + 5581^2 .

It is an emirp because it is prime and its reverse (161120261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162021161 - 2² = 162021157 is a prime.

It is a super-2 number, since 2×162021161² = 52501713223575842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (162021061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81010580 + 81010581.

It is an arithmetic number, because the mean of its divisors is an integer number (81010581).

Almost surely, 2^162021161 is an apocalyptic number.

It is an amenable number.

162021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

162021161 is an equidigital number, since it uses as much as digits as its factorization.

162021161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 162021161 is about 12728.7533168021. The cubic root of 162021161 is about 545.1599126736.

The spelling of 162021161 in words is "one hundred sixty-two million, twenty-one thousand, one hundred sixty-one".