163281101 has 4 divisors (see below), whose sum is σ = 163312572. Its totient is φ = 163249632.

The previous prime is 163281047. The next prime is 163281103. The reversal of 163281101 is 101182361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101182361 = 7 ⋅14454623.

It can be written as a sum of positive squares in 2 ways, for example, as 84088900 + 79192201 = 9170^2 + 8899^2 .

It is a cyclic number.

It is not a de Polignac number, because 163281101 - 2²² = 159086797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163281103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5906 + ... + 19011.

It is an arithmetic number, because the mean of its divisors is an integer number (40828143).

Almost surely, 2^163281101 is an apocalyptic number.

It is an amenable number.

163281101 is a deficient number, since it is larger than the sum of its proper divisors (31471).

163281101 is an equidigital number, since it uses as much as digits as its factorization.

163281101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31470.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 163281101 is about 12778.1493573991. The cubic root of 163281101 is about 546.5693910711.

The spelling of 163281101 in words is "one hundred sixty-three million, two hundred eighty-one thousand, one hundred one".