243072101 has 2 divisors, whose sum is σ = 243072102. Its totient is φ = 243072100.

The previous prime is 243072061. The next prime is 243072107. The reversal of 243072101 is 101270342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174927076 + 68145025 = 13226^2 + 8255^2 .

It is a cyclic number.

It is not a de Polignac number, because 243072101 - 2¹⁰ = 243071077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243072107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121536050 + 121536051.

It is an arithmetic number, because the mean of its divisors is an integer number (121536051).

Almost surely, 2^243072101 is an apocalyptic number.

It is an amenable number.

243072101 is a deficient number, since it is larger than the sum of its proper divisors (1).

243072101 is an equidigital number, since it uses as much as digits as its factorization.

243072101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 243072101 is about 15590.7697372516. The cubic root of 243072101 is about 624.0868593818.

The spelling of 243072101 in words is "two hundred forty-three million, seventy-two thousand, one hundred one".