222184381 has 2 divisors, whose sum is σ = 222184382. Its totient is φ = 222184380.

The previous prime is 222184357. The next prime is 222184433. The reversal of 222184381 is 183481222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 108868356 = 10645^2 + 10434^2 .

It is a cyclic number.

It is not a de Polignac number, because 222184381 - 2⁹ = 222183869 is a prime.

It is a super-2 number, since 2×222184381² = 98731798320706322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222184331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111092190 + 111092191.

It is an arithmetic number, because the mean of its divisors is an integer number (111092191).

Almost surely, 2^222184381 is an apocalyptic number.

It is an amenable number.

222184381 is a deficient number, since it is larger than the sum of its proper divisors (1).

222184381 is an equidigital number, since it uses as much as digits as its factorization.

222184381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 222184381 is about 14905.8505627824. The cubic root of 222184381 is about 605.6724812936.

The spelling of 222184381 in words is "two hundred twenty-two million, one hundred eighty-four thousand, three hundred eighty-one".