243345435401 has 2 divisors, whose sum is σ = 243345435402. Its totient is φ = 243345435400.

The previous prime is 243345435379. The next prime is 243345435407. The reversal of 243345435401 is 104534543342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216597160000 + 26748275401 = 465400^2 + 163549^2 .

It is a cyclic number.

It is not a de Polignac number, because 243345435401 - 2¹⁴ = 243345419017 is a prime.

It is not a weakly prime, because it can be changed into another prime (243345435407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121672717700 + 121672717701.

It is an arithmetic number, because the mean of its divisors is an integer number (121672717701).

Almost surely, 2^243345435401 is an apocalyptic number.

It is an amenable number.

243345435401 is a deficient number, since it is larger than the sum of its proper divisors (1).

243345435401 is an equidigital number, since it uses as much as digits as its factorization.

243345435401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 38.

Adding to 243345435401 its reverse (104534543342), we get a palindrome (347879978743).

The spelling of 243345435401 in words is "two hundred forty-three billion, three hundred forty-five million, four hundred thirty-five thousand, four hundred one".