224239181 has 2 divisors, whose sum is σ = 224239182. Its totient is φ = 224239180.

The previous prime is 224239153. The next prime is 224239217. The reversal of 224239181 is 181932422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220374025 + 3865156 = 14845^2 + 1966^2 .

It is a cyclic number.

It is not a de Polignac number, because 224239181 - 2¹⁸ = 223977037 is a prime.

It is a super-2 number, since 2×224239181² = 100566420591101522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224239481) 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, 112119590 + 112119591.

It is an arithmetic number, because the mean of its divisors is an integer number (112119591).

Almost surely, 2^224239181 is an apocalyptic number.

It is an amenable number.

224239181 is a deficient number, since it is larger than the sum of its proper divisors (1).

224239181 is an equidigital number, since it uses as much as digits as its factorization.

224239181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 224239181 is about 14974.6178916191. The cubic root of 224239181 is about 607.5338765282.

The spelling of 224239181 in words is "two hundred twenty-four million, two hundred thirty-nine thousand, one hundred eighty-one".