223944181 has 2 divisors, whose sum is σ = 223944182. Its totient is φ = 223944180.

The previous prime is 223944163. The next prime is 223944199. The reversal of 223944181 is 181449322.

It is a balanced prime because it is at equal distance from previous prime (223944163) and next prime (223944199).

It can be written as a sum of positive squares in only one way, i.e., 195748081 + 28196100 = 13991^2 + 5310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223944181 is a prime.

It is a super-2 number, since 2×223944181² = 100301992407521522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223944101) 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, 111972090 + 111972091.

It is an arithmetic number, because the mean of its divisors is an integer number (111972091).

Almost surely, 2^223944181 is an apocalyptic number.

It is an amenable number.

223944181 is a deficient number, since it is larger than the sum of its proper divisors (1).

223944181 is an equidigital number, since it uses as much as digits as its factorization.

223944181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 223944181 is about 14964.7646490013. The cubic root of 223944181 is about 607.2673439462.

The spelling of 223944181 in words is "two hundred twenty-three million, nine hundred forty-four thousand, one hundred eighty-one".