243354150217 has 2 divisors, whose sum is σ = 243354150218. Its totient is φ = 243354150216.

The previous prime is 243354150181. The next prime is 243354150283. The reversal of 243354150217 is 712051453342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136440845641 + 106913304576 = 369379^2 + 326976^2 .

It is a cyclic number.

It is not a de Polignac number, because 243354150217 - 2¹⁵ = 243354117449 is a prime.

It is a super-2 number, since 2×243354150217² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243354150917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121677075108 + 121677075109.

It is an arithmetic number, because the mean of its divisors is an integer number (121677075109).

Almost surely, 2^243354150217 is an apocalyptic number.

It is an amenable number.

243354150217 is a deficient number, since it is larger than the sum of its proper divisors (1).

243354150217 is an equidigital number, since it uses as much as digits as its factorization.

243354150217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 243354150217 in words is "two hundred forty-three billion, three hundred fifty-four million, one hundred fifty thousand, two hundred seventeen".