500023521 has 24 divisors (see below), whose sum is σ = 746942976. Its totient is φ = 321995520.

The previous prime is 500023471. The next prime is 500023529. The reversal of 500023521 is 125320005.

It is a happy number.

It is not a de Polignac number, because 500023521 - 2⁹ = 500023009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 500023494 and 500023503.

It is not an unprimeable number, because it can be changed into a prime (500023529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186436 + ... + 189098.

It is an arithmetic number, because the mean of its divisors is an integer number (31122624).

Almost surely, 2^500023521 is an apocalyptic number.

It is an amenable number.

500023521 is a deficient number, since it is larger than the sum of its proper divisors (246919455).

500023521 is a wasteful number, since it uses less digits than its factorization.

500023521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373 (or 3370 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 500023521 is about 22361.2057143616. The cubic root of 500023521 is about 793.7129715423.

Adding to 500023521 its reverse (125320005), we get a palindrome (625343526).

The spelling of 500023521 in words is "five hundred million, twenty-three thousand, five hundred twenty-one".