222181229 has 2 divisors, whose sum is σ = 222181230. Its totient is φ = 222181228.

The previous prime is 222181217. The next prime is 222181241. The reversal of 222181229 is 922181222.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (222181217) and next prime (222181241).

It can be written as a sum of positive squares in only one way, i.e., 134328100 + 87853129 = 11590^2 + 9373^2 .

It is a cyclic number.

It is not a de Polignac number, because 222181229 - 2⁴ = 222181213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222181429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111090614 + 111090615.

It is an arithmetic number, because the mean of its divisors is an integer number (111090615).

Almost surely, 2^222181229 is an apocalyptic number.

It is an amenable number.

222181229 is a deficient number, since it is larger than the sum of its proper divisors (1).

222181229 is an equidigital number, since it uses as much as digits as its factorization.

222181229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 222181229 is about 14905.7448321109. The cubic root of 222181229 is about 605.6696171728.

The spelling of 222181229 in words is "two hundred twenty-two million, one hundred eighty-one thousand, two hundred twenty-nine".