224831213 has 2 divisors, whose sum is σ = 224831214. Its totient is φ = 224831212.

The previous prime is 224831209. The next prime is 224831263. The reversal of 224831213 is 312138422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223711849 + 1119364 = 14957^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 224831213 - 2² = 224831209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224831263) 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, 112415606 + 112415607.

It is an arithmetic number, because the mean of its divisors is an integer number (112415607).

Almost surely, 2^224831213 is an apocalyptic number.

It is an amenable number.

224831213 is a deficient number, since it is larger than the sum of its proper divisors (1).

224831213 is an equidigital number, since it uses as much as digits as its factorization.

224831213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 224831213 is about 14994.3727111207. The cubic root of 224831213 is about 608.0680731217.

Adding to 224831213 its reverse (312138422), we get a palindrome (536969635).

The spelling of 224831213 in words is "two hundred twenty-four million, eight hundred thirty-one thousand, two hundred thirteen".