243601231 has 2 divisors, whose sum is σ = 243601232. Its totient is φ = 243601230.

The previous prime is 243601201. The next prime is 243601249. The reversal of 243601231 is 132106342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243601231 - 2⁵ = 243601199 is a prime.

It is a super-2 number, since 2×243601231² = 118683119489430722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243601201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121800615 + 121800616.

It is an arithmetic number, because the mean of its divisors is an integer number (121800616).

Almost surely, 2^243601231 is an apocalyptic number.

243601231 is a deficient number, since it is larger than the sum of its proper divisors (1).

243601231 is an equidigital number, since it uses as much as digits as its factorization.

243601231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 243601231 is about 15607.7298477389. The cubic root of 243601231 is about 624.5393777268.

Adding to 243601231 its reverse (132106342), we get a palindrome (375707573).

The spelling of 243601231 in words is "two hundred forty-three million, six hundred one thousand, two hundred thirty-one".