243351442553 has 16 divisors (see below), whose sum is σ = 249680793600. Its totient is φ = 237109825680.

The previous prime is 243351442531. The next prime is 243351442601. The reversal of 243351442553 is 355244153342.

It is a cyclic number.

It is not a de Polignac number, because 243351442553 - 2⁸ = 243351442297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243351442553.

It is not an unprimeable number, because it can be changed into a prime (243351442153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5953058 + ... + 5993796.

It is an arithmetic number, because the mean of its divisors is an integer number (15605049600).

Almost surely, 2^243351442553 is an apocalyptic number.

It is an amenable number.

243351442553 is a deficient number, since it is larger than the sum of its proper divisors (6329351047).

243351442553 is an equidigital number, since it uses as much as digits as its factorization.

243351442553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41812.

The product of its digits is 864000, while the sum is 41.

Adding to 243351442553 its reverse (355244153342), we get a palindrome (598595595895).

The spelling of 243351442553 in words is "two hundred forty-three billion, three hundred fifty-one million, four hundred forty-two thousand, five hundred fifty-three".