163222181 has 2 divisors, whose sum is σ = 163222182. Its totient is φ = 163222180.

The previous prime is 163222127. The next prime is 163222193. The reversal of 163222181 is 181222361.

163222181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140801956 + 22420225 = 11866^2 + 4735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163222181 is a prime.

It is a super-2 number, since 2×163222181² = 53282960740793522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163222181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163222481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81611090 + 81611091.

It is an arithmetic number, because the mean of its divisors is an integer number (81611091).

Almost surely, 2^163222181 is an apocalyptic number.

It is an amenable number.

163222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

163222181 is an equidigital number, since it uses as much as digits as its factorization.

163222181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 163222181 is about 12775.8436512036. The cubic root of 163222181 is about 546.5036399570.

The spelling of 163222181 in words is "one hundred sixty-three million, two hundred twenty-two thousand, one hundred eighty-one".