523503023 has 4 divisors (see below), whose sum is σ = 546264048. Its totient is φ = 500742000.

The previous prime is 523503011. The next prime is 523503103. The reversal of 523503023 is 320305325.

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-523503023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 22761001 = 523503023 / (5 + 2 + 3 + 5 + 0 + 3 + 0 + 2 + 3).

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 523503023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523508023) 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, 11380478 + ... + 11380523.

It is an arithmetic number, because the mean of its divisors is an integer number (136566012).

Almost surely, 2^523503023 is an apocalyptic number.

523503023 is a deficient number, since it is larger than the sum of its proper divisors (22761025).

523503023 is a wasteful number, since it uses less digits than its factorization.

523503023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22761024.

The product of its (nonzero) digits is 2700, while the sum is 23.

The square root of 523503023 is about 22880.1884389093. The cubic root of 523503023 is about 805.9468421123.

Adding to 523503023 its reverse (320305325), we get a palindrome (843808348).

The spelling of 523503023 in words is "five hundred twenty-three million, five hundred three thousand, twenty-three".