243213407315323 has 4 divisors (see below), whose sum is σ = 243213631185240. Its totient is φ = 243213183445408.

The previous prime is 243213407315297. The next prime is 243213407315387. The reversal of 243213407315323 is 323513704312342.

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 243213407315323 - 2⁴⁵ = 208029035226491 is a prime.

It is a super-2 number, since 2×243213407315323² (a number of 30 digits) contains 22 as substring.

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 243213407315323.

It is not an unprimeable number, because it can be changed into a prime (243213407315393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110297365 + ... + 112480822.

It is an arithmetic number, because the mean of its divisors is an integer number (60803407796310).

Almost surely, 2^{243213407315323} is an apocalyptic number.

243213407315323 is a deficient number, since it is larger than the sum of its proper divisors (223869917).

243213407315323 is a wasteful number, since it uses less digits than its factorization.

243213407315323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223869916.

The product of its (nonzero) digits is 1088640, while the sum is 43.

The spelling of 243213407315323 in words is "two hundred forty-three trillion, two hundred thirteen billion, four hundred seven million, three hundred fifteen thousand, three hundred twenty-three".