243543203453 has 16 divisors (see below), whose sum is σ = 272905355520. Its totient is φ = 215414131200.

The previous prime is 243543203437. The next prime is 243543203543. The reversal of 243543203453 is 354302345342.

It is not a de Polignac number, because 243543203453 - 2⁴ = 243543203437 is a prime.

It is a super-3 number, since 3×243543203453³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243543203153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570188 + ... + 901221.

It is an arithmetic number, because the mean of its divisors is an integer number (17056584720).

Almost surely, 2^243543203453 is an apocalyptic number.

It is an amenable number.

243543203453 is a deficient number, since it is larger than the sum of its proper divisors (29362152067).

243543203453 is a wasteful number, since it uses less digits than its factorization.

243543203453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471828.

The product of its (nonzero) digits is 518400, while the sum is 38.

Adding to 243543203453 its reverse (354302345342), we get a palindrome (597845548795).

The spelling of 243543203453 in words is "two hundred forty-three billion, five hundred forty-three million, two hundred three thousand, four hundred fifty-three".