243243400535 has 4 divisors (see below), whose sum is σ = 291892080648. Its totient is φ = 194594720424.

The previous prime is 243243400511. The next prime is 243243400549. The reversal of 243243400535 is 535004342342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243243400535 - 2³² = 238948433239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243243400495 and 243243400504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24324340049 + ... + 24324340058.

It is an arithmetic number, because the mean of its divisors is an integer number (72973020162).

Almost surely, 2^243243400535 is an apocalyptic number.

243243400535 is a deficient number, since it is larger than the sum of its proper divisors (48648680113).

243243400535 is an equidigital number, since it uses as much as digits as its factorization.

243243400535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48648680112.

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 243243400535 its reverse (535004342342), we get a palindrome (778247742877).

The spelling of 243243400535 in words is "two hundred forty-three billion, two hundred forty-three million, four hundred thousand, five hundred thirty-five".