503534321 has 16 divisors (see below), whose sum is σ = 522087120. Its totient is φ = 485422080.

The previous prime is 503534309. The next prime is 503534323. The reversal of 503534321 is 123435305.

It can be written as a sum of positive squares in 8 ways, for example, as 2446096 + 501088225 = 1564^2 + 22385^2 .

It is a cyclic number.

It is not a de Polignac number, because 503534321 - 2¹⁰ = 503533297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503534323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 743435 + ... + 744111.

It is an arithmetic number, because the mean of its divisors is an integer number (32630445).

Almost surely, 2^503534321 is an apocalyptic number.

It is an amenable number.

503534321 is a deficient number, since it is larger than the sum of its proper divisors (18552799).

503534321 is a wasteful number, since it uses less digits than its factorization.

503534321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 503534321 is about 22439.5704281521. The cubic root of 503534321 is about 795.5662650758.

Adding to 503534321 its reverse (123435305), we get a palindrome (626969626).

The spelling of 503534321 in words is "five hundred three million, five hundred thirty-four thousand, three hundred twenty-one".