516330621 has 12 divisors (see below), whose sum is σ = 746081440. Its totient is φ = 344095560.

The previous prime is 516330593. The next prime is 516330631. The reversal of 516330621 is 126033615.

516330621 is a `hidden beast` number, since 5 + 1 + 6 + 3 + 30 + 621 = 666.

It is not a de Polignac number, because 516330621 - 2¹⁴ = 516314237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516330631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20670 + ... + 38208.

Almost surely, 2^516330621 is an apocalyptic number.

It is an amenable number.

516330621 is a deficient number, since it is larger than the sum of its proper divisors (229750819).

516330621 is a wasteful number, since it uses less digits than its factorization.

516330621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20816 (or 20813 counting only the distinct ones).

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

The square root of 516330621 is about 22722.9096068263. The cubic root of 516330621 is about 802.2492022063.

The spelling of 516330621 in words is "five hundred sixteen million, three hundred thirty thousand, six hundred twenty-one".