163281207 has 4 divisors (see below), whose sum is σ = 217708280. Its totient is φ = 108854136.

The previous prime is 163281199. The next prime is 163281319. The reversal of 163281207 is 702182361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702182361 = 3 ⋅234060787.

It is not a de Polignac number, because 163281207 - 2³ = 163281199 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 (163281607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27213532 + ... + 27213537.

It is an arithmetic number, because the mean of its divisors is an integer number (54427070).

Almost surely, 2^163281207 is an apocalyptic number.

163281207 is a deficient number, since it is larger than the sum of its proper divisors (54427073).

163281207 is an equidigital number, since it uses as much as digits as its factorization.

163281207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54427072.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 163281207 is about 12778.1535051039. The cubic root of 163281207 is about 546.5695093464.

The spelling of 163281207 in words is "one hundred sixty-three million, two hundred eighty-one thousand, two hundred seven".