516630321 has 12 divisors (see below), whose sum is σ = 746448820. Its totient is φ = 344325600.

The previous prime is 516630281. The next prime is 516630341. The reversal of 516630321 is 123036615.

516630321 is a `hidden beast` number, since 5 + 1 + 6 + 630 + 3 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 291180096 + 225450225 = 17064^2 + 15015^2 .

It is not a de Polignac number, because 516630321 - 2⁷ = 516630193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516630341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46275 + ... + 56343.

Almost surely, 2^516630321 is an apocalyptic number.

It is an amenable number.

516630321 is a deficient number, since it is larger than the sum of its proper divisors (229818499).

516630321 is a wasteful number, since it uses less digits than its factorization.

516630321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15776 (or 15773 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 516630321 is about 22729.5033161748. The cubic root of 516630321 is about 802.4043919057.

Adding to 516630321 its reverse (123036615), we get a palindrome (639666936).

The spelling of 516630321 in words is "five hundred sixteen million, six hundred thirty thousand, three hundred twenty-one".