243312053523 has 16 divisors (see below), whose sum is σ = 404466790656. Its totient is φ = 126395871840.

The previous prime is 243312053497. The next prime is 243312053531. The reversal of 243312053523 is 325350213342.

It is not a de Polignac number, because 243312053523 - 2⁸ = 243312053267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (243312053723) 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, 526649236 + ... + 526649697.

It is an arithmetic number, because the mean of its divisors is an integer number (25279174416).

Almost surely, 2^243312053523 is an apocalyptic number.

243312053523 is a deficient number, since it is larger than the sum of its proper divisors (161154737133).

243312053523 is a wasteful number, since it uses less digits than its factorization.

243312053523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053298954.

The product of its (nonzero) digits is 64800, while the sum is 33.

Adding to 243312053523 its reverse (325350213342), we get a palindrome (568662266865).

The spelling of 243312053523 in words is "two hundred forty-three billion, three hundred twelve million, fifty-three thousand, five hundred twenty-three".