243168432523 has 4 divisors (see below), whose sum is σ = 243222318808. Its totient is φ = 243114546240.

The previous prime is 243168432487. The next prime is 243168432541. The reversal of 243168432523 is 325234861342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243168432523 is a prime.

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 243168432523.

It is not an unprimeable number, because it can be changed into a prime (243168432553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26936373 + ... + 26945398.

It is an arithmetic number, because the mean of its divisors is an integer number (60805579702).

Almost surely, 2^243168432523 is an apocalyptic number.

243168432523 is a deficient number, since it is larger than the sum of its proper divisors (53886285).

243168432523 is an equidigital number, since it uses as much as digits as its factorization.

243168432523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53886284.

The product of its digits is 829440, while the sum is 43.

The spelling of 243168432523 in words is "two hundred forty-three billion, one hundred sixty-eight million, four hundred thirty-two thousand, five hundred twenty-three".