243123503323 has 32 divisors (see below), whose sum is σ = 261931507200. Its totient is φ = 225108930816.

The previous prime is 243123503281. The next prime is 243123503327. The reversal of 243123503323 is 323305321342.

It is a cyclic number.

It is not a de Polignac number, because 243123503323 - 2²⁵ = 243089948891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243123503327) 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, 51408823 + ... + 51413551.

It is an arithmetic number, because the mean of its divisors is an integer number (8185359600).

Almost surely, 2^243123503323 is an apocalyptic number.

243123503323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

243123503323 is a deficient number, since it is larger than the sum of its proper divisors (18808003877).

243123503323 is a wasteful number, since it uses less digits than its factorization.

243123503323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251.

The product of its (nonzero) digits is 38880, while the sum is 31.

Adding to 243123503323 its reverse (323305321342), we get a palindrome (566428824665).

The spelling of 243123503323 in words is "two hundred forty-three billion, one hundred twenty-three million, five hundred three thousand, three hundred twenty-three".