506345321 has 4 divisors (see below), whose sum is σ = 506454144. Its totient is φ = 506236500.

The previous prime is 506345309. The next prime is 506345347. The reversal of 506345321 is 123543605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 506345321 - 2¹⁴ = 506328937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506345921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47105 + ... + 56846.

It is an arithmetic number, because the mean of its divisors is an integer number (126613536).

Almost surely, 2^506345321 is an apocalyptic number.

It is an amenable number.

506345321 is a deficient number, since it is larger than the sum of its proper divisors (108823).

506345321 is a wasteful number, since it uses less digits than its factorization.

506345321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108822.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 506345321 is about 22502.1181447436. The cubic root of 506345321 is about 797.0439453169.

Adding to 506345321 its reverse (123543605), we get a palindrome (629888926).

It can be divided in two parts, 50634 and 5321, that added together give a palindrome (55955).

The spelling of 506345321 in words is "five hundred six million, three hundred forty-five thousand, three hundred twenty-one".