231228259 has 2 divisors, whose sum is σ = 231228260. Its totient is φ = 231228258.

The previous prime is 231228253. The next prime is 231228293. The reversal of 231228259 is 952822132.

It is an a-pointer prime, because the next prime (231228293) can be obtained adding 231228259 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231228259 - 2³ = 231228251 is a prime.

It is a super-3 number, since 3×231228259³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (231228251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115614129 + 115614130.

It is an arithmetic number, because the mean of its divisors is an integer number (115614130).

Almost surely, 2^231228259 is an apocalyptic number.

231228259 is a deficient number, since it is larger than the sum of its proper divisors (1).

231228259 is an equidigital number, since it uses as much as digits as its factorization.

231228259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 231228259 is about 15206.1914692667. The cubic root of 231228259 is about 613.7812769805.

The spelling of 231228259 in words is "two hundred thirty-one million, two hundred twenty-eight thousand, two hundred fifty-nine".