231020243 has 2 divisors, whose sum is σ = 231020244. Its totient is φ = 231020242.

The previous prime is 231020233. The next prime is 231020249. The reversal of 231020243 is 342020132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231020243 - 2²⁶ = 163911379 is a prime.

It is not a weakly prime, because it can be changed into another prime (231020249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510121 + 115510122.

It is an arithmetic number, because the mean of its divisors is an integer number (115510122).

Almost surely, 2^231020243 is an apocalyptic number.

231020243 is a deficient number, since it is larger than the sum of its proper divisors (1).

231020243 is an equidigital number, since it uses as much as digits as its factorization.

231020243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 231020243 is about 15199.3500847898. The cubic root of 231020243 is about 613.5971665085.

Adding to 231020243 its reverse (342020132), we get a palindrome (573040375).

The spelling of 231020243 in words is "two hundred thirty-one million, twenty thousand, two hundred forty-three".