523145113503 has 4 divisors (see below), whose sum is σ = 697526818008. Its totient is φ = 348763409000.

The previous prime is 523145113409. The next prime is 523145113523. The reversal of 523145113503 is 305311541325.

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 523145113503 - 2³⁶ = 454425636767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523145113523) 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, 87190852248 + ... + 87190852253.

It is an arithmetic number, because the mean of its divisors is an integer number (174381704502).

Almost surely, 2^523145113503 is an apocalyptic number.

523145113503 is a deficient number, since it is larger than the sum of its proper divisors (174381704505).

523145113503 is a wasteful number, since it uses less digits than its factorization.

523145113503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174381704504.

The product of its (nonzero) digits is 27000, while the sum is 33.

Adding to 523145113503 its reverse (305311541325), we get a palindrome (828456654828).

The spelling of 523145113503 in words is "five hundred twenty-three billion, one hundred forty-five million, one hundred thirteen thousand, five hundred three".