229081 has 2 divisors, whose sum is σ = 229082. Its totient is φ = 229080.

The previous prime is 229037. The next prime is 229093. The reversal of 229081 is 180922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144400 + 84681 = 380^2 + 291^2 .

It is a cyclic number.

It is not a de Polignac number, because 229081 - 2⁷ = 228953 is a prime.

It is a super-2 number, since 2×229081² = 104956209122, which contains 22 as substring.

It is an Ulam number.

229081 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (229181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114540 + 114541.

It is an arithmetic number, because the mean of its divisors is an integer number (114541).

2²²⁹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

229081 is a deficient number, since it is larger than the sum of its proper divisors (1).

229081 is an equidigital number, since it uses as much as digits as its factorization.

229081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 229081 is about 478.6240695995. The cubic root of 229081 is about 61.1875442776.

The spelling of 229081 in words is "two hundred twenty-nine thousand, eighty-one".