243052501 has 2 divisors, whose sum is σ = 243052502. Its totient is φ = 243052500.

The previous prime is 243052489. The next prime is 243052543. The reversal of 243052501 is 105250342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139216401 + 103836100 = 11799^2 + 10190^2 .

It is a cyclic number.

It is not a de Polignac number, because 243052501 - 2⁷ = 243052373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243052591) 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, 121526250 + 121526251.

It is an arithmetic number, because the mean of its divisors is an integer number (121526251).

Almost surely, 2^243052501 is an apocalyptic number.

It is an amenable number.

243052501 is a deficient number, since it is larger than the sum of its proper divisors (1).

243052501 is an equidigital number, since it uses as much as digits as its factorization.

243052501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 243052501 is about 15590.1411475329. The cubic root of 243052501 is about 624.0700846180.

The spelling of 243052501 in words is "two hundred forty-three million, fifty-two thousand, five hundred one".