243055601 has 2 divisors, whose sum is σ = 243055602. Its totient is φ = 243055600.

The previous prime is 243055577. The next prime is 243055607. The reversal of 243055601 is 106550342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188650225 + 54405376 = 13735^2 + 7376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243055601 is a prime.

It is not a weakly prime, because it can be changed into another prime (243055607) 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, 121527800 + 121527801.

It is an arithmetic number, because the mean of its divisors is an integer number (121527801).

Almost surely, 2^243055601 is an apocalyptic number.

It is an amenable number.

243055601 is a deficient number, since it is larger than the sum of its proper divisors (1).

243055601 is an equidigital number, since it uses as much as digits as its factorization.

243055601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 243055601 is about 15590.2405690227. The cubic root of 243055601 is about 624.0727378295.

The spelling of 243055601 in words is "two hundred forty-three million, fifty-five thousand, six hundred one".