236381 has 2 divisors, whose sum is σ = 236382. Its totient is φ = 236380.

The previous prime is 236377. The next prime is 236387. The reversal of 236381 is 183632.

236381 is nontrivially palindromic in base 6.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235225 + 1156 = 485^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 236381 - 2² = 236377 is a prime.

It is a super-2 number, since 2×236381² = 111751954322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (236387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118190 + 118191.

It is an arithmetic number, because the mean of its divisors is an integer number (118191).

2²³⁶³⁸¹ is an apocalyptic number.

It is an amenable number.

236381 is a deficient number, since it is larger than the sum of its proper divisors (1).

236381 is an equidigital number, since it uses as much as digits as its factorization.

236381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 236381 is about 486.1902919640. The cubic root of 236381 is about 61.8307035948.

The spelling of 236381 in words is "two hundred thirty-six thousand, three hundred eighty-one".