506210721 has 8 divisors (see below), whose sum is σ = 676394784. Its totient is φ = 336750240.

The previous prime is 506210671. The next prime is 506210741. The reversal of 506210721 is 127012605.

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

It is a de Polignac number, because none of the positive numbers 2^k-506210721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 506210691 and 506210700.

It is not an unprimeable number, because it can be changed into a prime (506210741) 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 7 ways as a sum of consecutive naturals, for example, 179260 + ... + 182061.

It is an arithmetic number, because the mean of its divisors is an integer number (84549348).

Almost surely, 2^506210721 is an apocalyptic number.

It is an amenable number.

506210721 is a deficient number, since it is larger than the sum of its proper divisors (170184063).

506210721 is a wasteful number, since it uses less digits than its factorization.

506210721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361791.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 506210721 is about 22499.1271164016. The cubic root of 506210721 is about 796.9733139262.

The spelling of 506210721 in words is "five hundred six million, two hundred ten thousand, seven hundred twenty-one".