238181 has 2 divisors, whose sum is σ = 238182. Its totient is φ = 238180.

The previous prime is 238171. The next prime is 238201. The reversal of 238181 is 181832.

238181 is nontrivially palindromic in base 13.

238181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217156 + 21025 = 466^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 238181 - 2¹⁰ = 237157 is a prime.

It is a super-2 number, since 2×238181² = 113460377522, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119090 + 119091.

It is an arithmetic number, because the mean of its divisors is an integer number (119091).

2²³⁸¹⁸¹ is an apocalyptic number.

It is an amenable number.

238181 is a deficient number, since it is larger than the sum of its proper divisors (1).

238181 is an equidigital number, since it uses as much as digits as its factorization.

238181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

The square root of 238181 is about 488.0379083637. The cubic root of 238181 is about 61.9872502399.

It can be divided in two parts, 2 and 38181, that added together give a palindrome (38183).

The spelling of 238181 in words is "two hundred thirty-eight thousand, one hundred eighty-one".