243111073 has 2 divisors, whose sum is σ = 243111074. Its totient is φ = 243111072.

The previous prime is 243111019. The next prime is 243111079. The reversal of 243111073 is 370111342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139641489 + 103469584 = 11817^2 + 10172^2 .

It is a cyclic number.

It is not a de Polignac number, because 243111073 - 2²¹ = 241013921 is a prime.

It is a super-2 number, since 2×243111073² = 118205987630422658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243111079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121555536 + 121555537.

It is an arithmetic number, because the mean of its divisors is an integer number (121555537).

Almost surely, 2^243111073 is an apocalyptic number.

It is an amenable number.

243111073 is a deficient number, since it is larger than the sum of its proper divisors (1).

243111073 is an equidigital number, since it uses as much as digits as its factorization.

243111073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 243111073 is about 15592.0195292335. The cubic root of 243111073 is about 624.1202110955.

The spelling of 243111073 in words is "two hundred forty-three million, one hundred eleven thousand, seventy-three".