243154532213 has 2 divisors, whose sum is σ = 243154532214. Its totient is φ = 243154532212.

The previous prime is 243154532167. The next prime is 243154532263. The reversal of 243154532213 is 312235451342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123965255569 + 119189276644 = 352087^2 + 345238^2 .

It is a cyclic number.

It is not a de Polignac number, because 243154532213 - 2⁶ = 243154532149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243154532263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121577266106 + 121577266107.

It is an arithmetic number, because the mean of its divisors is an integer number (121577266107).

Almost surely, 2^243154532213 is an apocalyptic number.

It is an amenable number.

243154532213 is a deficient number, since it is larger than the sum of its proper divisors (1).

243154532213 is an equidigital number, since it uses as much as digits as its factorization.

243154532213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 35.

Adding to 243154532213 its reverse (312235451342), we get a palindrome (555389983555).

The spelling of 243154532213 in words is "two hundred forty-three billion, one hundred fifty-four million, five hundred thirty-two thousand, two hundred thirteen".