523535561243 has 4 divisors (see below), whose sum is σ = 523556166720. Its totient is φ = 523514955768.

The previous prime is 523535561239. The next prime is 523535561257. The reversal of 523535561243 is 342165535325.

It is a happy number.

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 523535561243 - 2² = 523535561239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 523535561194 and 523535561203.

It is not an unprimeable number, because it can be changed into a prime (523535501243) 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, 10264580 + ... + 10315457.

It is an arithmetic number, because the mean of its divisors is an integer number (130889041680).

Almost surely, 2^523535561243 is an apocalyptic number.

523535561243 is a deficient number, since it is larger than the sum of its proper divisors (20605477).

523535561243 is a wasteful number, since it uses less digits than its factorization.

523535561243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20605476.

The product of its digits is 1620000, while the sum is 44.

The spelling of 523535561243 in words is "five hundred twenty-three billion, five hundred thirty-five million, five hundred sixty-one thousand, two hundred forty-three".