163326161 has 4 divisors (see below), whose sum is σ = 163437924. Its totient is φ = 163214400.

The previous prime is 163326143. The next prime is 163326179. The reversal of 163326161 is 161623361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161623361 = 59 ⋅2739379.

It is an interprime number because it is at equal distance from previous prime (163326143) and next prime (163326179).

It can be written as a sum of positive squares in 2 ways, for example, as 58140625 + 105185536 = 7625^2 + 10256^2 .

It is a cyclic number.

It is not a de Polignac number, because 163326161 - 2¹⁴ = 163309777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163326131) 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, 53660 + ... + 56621.

It is an arithmetic number, because the mean of its divisors is an integer number (40859481).

Almost surely, 2^163326161 is an apocalyptic number.

It is an amenable number.

163326161 is a deficient number, since it is larger than the sum of its proper divisors (111763).

163326161 is a wasteful number, since it uses less digits than its factorization.

163326161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111762.

The product of its digits is 3888, while the sum is 29.

The square root of 163326161 is about 12779.9124018907. The cubic root of 163326161 is about 546.6196646003.

The spelling of 163326161 in words is "one hundred sixty-three million, three hundred twenty-six thousand, one hundred sixty-one".