222085181 has 2 divisors, whose sum is σ = 222085182. Its totient is φ = 222085180.

The previous prime is 222085169. The next prime is 222085183. The reversal of 222085181 is 181580222.

It is a happy number.

222085181 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., 205348900 + 16736281 = 14330^2 + 4091^2 .

It is a cyclic number.

It is not a de Polignac number, because 222085181 - 2¹⁰ = 222084157 is a prime.

It is a super-2 number, since 2×222085181² = 98643655239605522, which contains 22 as substring.

Together with 222085183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222085183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111042590 + 111042591.

It is an arithmetic number, because the mean of its divisors is an integer number (111042591).

Almost surely, 2^222085181 is an apocalyptic number.

It is an amenable number.

222085181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222085181 is an equidigital number, since it uses as much as digits as its factorization.

222085181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 222085181 is about 14902.5226388018. The cubic root of 222085181 is about 605.5823284606.

The spelling of 222085181 in words is "two hundred twenty-two million, eighty-five thousand, one hundred eighty-one".