222202181 has 2 divisors, whose sum is σ = 222202182. Its totient is φ = 222202180.

The previous prime is 222202171. The next prime is 222202231. The reversal of 222202181 is 181202222.

It is a happy number.

222202181 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., 168766081 + 53436100 = 12991^2 + 7310^2 .

It is a cyclic number.

It is not a de Polignac number, because 222202181 - 2¹⁰ = 222201157 is a prime.

It is a super-2 number, since 2×222202181² = 98747618482313522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222202111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111101090 + 111101091.

It is an arithmetic number, because the mean of its divisors is an integer number (111101091).

Almost surely, 2^222202181 is an apocalyptic number.

It is an amenable number.

222202181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222202181 is an equidigital number, since it uses as much as digits as its factorization.

222202181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 222202181 is about 14906.4476318136. The cubic root of 222202181 is about 605.6886550712.

The spelling of 222202181 in words is "two hundred twenty-two million, two hundred two thousand, one hundred eighty-one".