229943281 has 2 divisors, whose sum is σ = 229943282. Its totient is φ = 229943280.

The previous prime is 229943269. The next prime is 229943303. The reversal of 229943281 is 182349922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171191056 + 58752225 = 13084^2 + 7665^2 .

It is a cyclic number.

It is not a de Polignac number, because 229943281 - 2⁵ = 229943249 is a prime.

It is a super-2 number, since 2×229943281² = 105747824954089922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (229943081) 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, 114971640 + 114971641.

It is an arithmetic number, because the mean of its divisors is an integer number (114971641).

Almost surely, 2^229943281 is an apocalyptic number.

It is an amenable number.

229943281 is a deficient number, since it is larger than the sum of its proper divisors (1).

229943281 is an equidigital number, since it uses as much as digits as its factorization.

229943281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 229943281 is about 15163.8808027497. The cubic root of 229943281 is about 612.6421991653.

The spelling of 229943281 in words is "two hundred twenty-nine million, nine hundred forty-three thousand, two hundred eighty-one".