238331 has 2 divisors, whose sum is σ = 238332. Its totient is φ = 238330.

The previous prime is 238321. The next prime is 238339. The reversal of 238331 is 133832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238331 - 2⁶ = 238267 is a prime.

It is a super-2 number, since 2×238331² = 113603331122, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 238331.

It is not a weakly prime, because it can be changed into another prime (238339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119165 + 119166.

It is an arithmetic number, because the mean of its divisors is an integer number (119166).

238331 is a Friedman number, since it can be written as (83-21)^3+3, using all its digits and the basic arithmetic operations.

2²³⁸³³¹ is an apocalyptic number.

238331 is a deficient number, since it is larger than the sum of its proper divisors (1).

238331 is an equidigital number, since it uses as much as digits as its factorization.

238331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 238331 is about 488.1915607628. The cubic root of 238331 is about 62.0002601446. Note that the first 3 decimals are identical.

The spelling of 238331 in words is "two hundred thirty-eight thousand, three hundred thirty-one".