243248231 has 2 divisors, whose sum is σ = 243248232. Its totient is φ = 243248230.

The previous prime is 243248197. The next prime is 243248233. The reversal of 243248231 is 132842342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243248231 - 2⁶ = 243248167 is a prime.

It is a super-2 number, since 2×243248231² = 118339403769258722, which contains 22 as substring.

Together with 243248233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243248194 and 243248203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243248233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121624115 + 121624116.

It is an arithmetic number, because the mean of its divisors is an integer number (121624116).

Almost surely, 2^243248231 is an apocalyptic number.

243248231 is a deficient number, since it is larger than the sum of its proper divisors (1).

243248231 is an equidigital number, since it uses as much as digits as its factorization.

243248231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 29.

The square root of 243248231 is about 15596.4172488428. The cubic root of 243248231 is about 624.2375607297.

The spelling of 243248231 in words is "two hundred forty-three million, two hundred forty-eight thousand, two hundred thirty-one".