243320112523 has 4 divisors (see below), whose sum is σ = 243926896248. Its totient is φ = 242713328800.

The previous prime is 243320112491. The next prime is 243320112527. The reversal of 243320112523 is 325211023342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325211023342 = 2 ⋅162605511671.

It is a cyclic number.

It is not a de Polignac number, because 243320112523 - 2⁵ = 243320112491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243320112491 and 243320112500.

It is not an unprimeable number, because it can be changed into a prime (243320112527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303391261 + ... + 303392062.

It is an arithmetic number, because the mean of its divisors is an integer number (60981724062).

Almost surely, 2^243320112523 is an apocalyptic number.

243320112523 is a deficient number, since it is larger than the sum of its proper divisors (606783725).

243320112523 is an equidigital number, since it uses as much as digits as its factorization.

243320112523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606783724.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 243320112523 its reverse (325211023342), we get a palindrome (568531135865).

The spelling of 243320112523 in words is "two hundred forty-three billion, three hundred twenty million, one hundred twelve thousand, five hundred twenty-three".