229385281 has 2 divisors, whose sum is σ = 229385282. Its totient is φ = 229385280.

The previous prime is 229385257. The next prime is 229385291. The reversal of 229385281 is 182583922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184280625 + 45104656 = 13575^2 + 6716^2 .

It is a cyclic number.

It is not a de Polignac number, because 229385281 - 2⁵ = 229385249 is a prime.

It is a super-2 number, since 2×229385281² = 105235214278897922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (229385231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114692640 + 114692641.

It is an arithmetic number, because the mean of its divisors is an integer number (114692641).

Almost surely, 2^229385281 is an apocalyptic number.

It is an amenable number.

229385281 is a deficient number, since it is larger than the sum of its proper divisors (1).

229385281 is an equidigital number, since it uses as much as digits as its factorization.

229385281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 229385281 is about 15145.4706430669. The cubic root of 229385281 is about 612.1462344744.

The spelling of 229385281 in words is "two hundred twenty-nine million, three hundred eighty-five thousand, two hundred eighty-one".