243315341553 has 32 divisors (see below), whose sum is σ = 332812934784. Its totient is φ = 158058081792.

The previous prime is 243315341519. The next prime is 243315341561. The reversal of 243315341553 is 355143513342.

It is not a de Polignac number, because 243315341553 - 2²¹ = 243313244401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243315341573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28410450 + ... + 28419012.

It is an arithmetic number, because the mean of its divisors is an integer number (10400404212).

Almost surely, 2^243315341553 is an apocalyptic number.

It is an amenable number.

243315341553 is a deficient number, since it is larger than the sum of its proper divisors (89497593231).

243315341553 is a wasteful number, since it uses less digits than its factorization.

243315341553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9825.

The product of its digits is 324000, while the sum is 39.

Adding to 243315341553 its reverse (355143513342), we get a palindrome (598458854895).

The spelling of 243315341553 in words is "two hundred forty-three billion, three hundred fifteen million, three hundred forty-one thousand, five hundred fifty-three".