243862481 has 2 divisors, whose sum is σ = 243862482. Its totient is φ = 243862480.

The previous prime is 243862477. The next prime is 243862543. The reversal of 243862481 is 184268342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243859456 + 3025 = 15616^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 243862481 - 2² = 243862477 is a prime.

It is a super-2 number, since 2×243862481² = 118937819278950722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243862471) 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, 121931240 + 121931241.

It is an arithmetic number, because the mean of its divisors is an integer number (121931241).

Almost surely, 2^243862481 is an apocalyptic number.

It is an amenable number.

243862481 is a deficient number, since it is larger than the sum of its proper divisors (1).

243862481 is an equidigital number, since it uses as much as digits as its factorization.

243862481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 38.

The square root of 243862481 is about 15616.0968554886. The cubic root of 243862481 is about 624.7625602605.

The spelling of 243862481 in words is "two hundred forty-three million, eight hundred sixty-two thousand, four hundred eighty-one".