523503321 has 32 divisors (see below), whose sum is σ = 809481600. Its totient is φ = 297415680.

The previous prime is 523503319. The next prime is 523503353. The reversal of 523503321 is 123305325.

It is a happy number.

It is not a de Polignac number, because 523503321 - 2¹ = 523503319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 523503291 and 523503300.

It is not an unprimeable number, because it can be changed into a prime (523503521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149175 + ... + 152643.

It is an arithmetic number, because the mean of its divisors is an integer number (25296300).

Almost surely, 2^523503321 is an apocalyptic number.

523503321 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

523503321 is a deficient number, since it is larger than the sum of its proper divisors (285978279).

523503321 is a wasteful number, since it uses less digits than its factorization.

523503321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 523503321 is about 22880.1949510925. The cubic root of 523503321 is about 805.9469950386.

Adding to 523503321 its reverse (123305325), we get a palindrome (646808646).

The spelling of 523503321 in words is "five hundred twenty-three million, five hundred three thousand, three hundred twenty-one".