506550321 has 32 divisors (see below), whose sum is σ = 787200000. Its totient is φ = 321315984.

The previous prime is 506550299. The next prime is 506550347. The reversal of 506550321 is 123055605.

506550321 is a `hidden beast` number, since 5 + 0 + 655 + 0 + 3 + 2 + 1 = 666.

It is not a de Polignac number, because 506550321 - 2⁷ = 506550193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (506550721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121530 + ... + 125628.

It is an arithmetic number, because the mean of its divisors is an integer number (24600000).

Almost surely, 2^506550321 is an apocalyptic number.

It is an amenable number.

506550321 is a deficient number, since it is larger than the sum of its proper divisors (280649679).

506550321 is a wasteful number, since it uses less digits than its factorization.

506550321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330 (or 4324 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 506550321 is about 22506.6728105244. The cubic root of 506550321 is about 797.1514950834.

The spelling of 506550321 in words is "five hundred six million, five hundred fifty thousand, three hundred twenty-one".