506520321 has 8 divisors (see below), whose sum is σ = 715087584. Its totient is φ = 317816640.

The previous prime is 506520281. The next prime is 506520337. The reversal of 506520321 is 123025605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 506520321 - 2⁶ = 506520257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 506520291 and 506520300.

It is not an unprimeable number, because it can be changed into a prime (506520341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4965835 + ... + 4965936.

It is an arithmetic number, because the mean of its divisors is an integer number (89385948).

Almost surely, 2^506520321 is an apocalyptic number.

506520321 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

506520321 is a deficient number, since it is larger than the sum of its proper divisors (208567263).

506520321 is a wasteful number, since it uses less digits than its factorization.

506520321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931791.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 506520321 is about 22506.0063316440. The cubic root of 506520321 is about 797.1357579059.

Adding to 506520321 its reverse (123025605), we get a palindrome (629545926).

The spelling of 506520321 in words is "five hundred six million, five hundred twenty thousand, three hundred twenty-one".