506497321 has 4 divisors (see below), whose sum is σ = 552542544. Its totient is φ = 460452100.

The previous prime is 506497297. The next prime is 506497349. The reversal of 506497321 is 123794605.

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 a de Polignac number, because none of the positive numbers 2^k-506497321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506497021) 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, 23022595 + ... + 23022616.

It is an arithmetic number, because the mean of its divisors is an integer number (138135636).

Almost surely, 2^506497321 is an apocalyptic number.

It is an amenable number.

506497321 is a deficient number, since it is larger than the sum of its proper divisors (46045223).

506497321 is a wasteful number, since it uses less digits than its factorization.

506497321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46045222.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 506497321 is about 22505.4953511359. The cubic root of 506497321 is about 797.1236923156.

It can be divided in two parts, 50649 and 7321, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 506497321 in words is "five hundred six million, four hundred ninety-seven thousand, three hundred twenty-one".