238279231 has 2 divisors, whose sum is σ = 238279232. Its totient is φ = 238279230.

The previous prime is 238279213. The next prime is 238279253. The reversal of 238279231 is 132972832.

Together with previous prime (238279213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238279231 - 2⁵ = 238279199 is a prime.

It is a super-3 number, since 3×238279231³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238279201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119139615 + 119139616.

It is an arithmetic number, because the mean of its divisors is an integer number (119139616).

Almost surely, 2^238279231 is an apocalyptic number.

238279231 is a deficient number, since it is larger than the sum of its proper divisors (1).

238279231 is an equidigital number, since it uses as much as digits as its factorization.

238279231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 238279231 is about 15436.2958963606. The cubic root of 238279231 is about 619.9577069659.

The spelling of 238279231 in words is "two hundred thirty-eight million, two hundred seventy-nine thousand, two hundred thirty-one".