243501361 has 2 divisors, whose sum is σ = 243501362. Its totient is φ = 243501360.

The previous prime is 243501347. The next prime is 243501413. The reversal of 243501361 is 163105342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220700736 + 22800625 = 14856^2 + 4775^2 .

It is a cyclic number.

It is not a de Polignac number, because 243501361 - 2¹⁷ = 243370289 is a prime.

It is not a weakly prime, because it can be changed into another prime (243501301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121750680 + 121750681.

It is an arithmetic number, because the mean of its divisors is an integer number (121750681).

Almost surely, 2^243501361 is an apocalyptic number.

It is an amenable number.

243501361 is a deficient number, since it is larger than the sum of its proper divisors (1).

243501361 is an equidigital number, since it uses as much as digits as its factorization.

243501361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 243501361 is about 15604.5301435192. The cubic root of 243501361 is about 624.4540179046.

The spelling of 243501361 in words is "two hundred forty-three million, five hundred one thousand, three hundred sixty-one".