229181 has 2 divisors, whose sum is σ = 229182. Its totient is φ = 229180.

The previous prime is 229171. The next prime is 229189. The reversal of 229181 is 181922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220900 + 8281 = 470^2 + 91^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229181 is a prime.

It is a super-2 number, since 2×229181² = 105047861522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 229181.

It is not a weakly prime, because it can be changed into another prime (229189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114590 + 114591.

It is an arithmetic number, because the mean of its divisors is an integer number (114591).

2²²⁹¹⁸¹ is an apocalyptic number.

It is an amenable number.

229181 is a deficient number, since it is larger than the sum of its proper divisors (1).

229181 is an equidigital number, since it uses as much as digits as its factorization.

229181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 229181 is about 478.7285243225. The cubic root of 229181 is about 61.1964463171.

The spelling of 229181 in words is "two hundred twenty-nine thousand, one hundred eighty-one".