516821216 has 24 divisors (see below), whose sum is σ = 1077345360. Its totient is φ = 243209728.

The previous prime is 516821203. The next prime is 516821237. The reversal of 516821216 is 612128615.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 474476 + ... + 475563.

It is an arithmetic number, because the mean of its divisors is an integer number (44889390).

Almost surely, 2^516821216 is an apocalyptic number.

It is an amenable number.

516821216 is an abundant number, since it is smaller than the sum of its proper divisors (560524144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

516821216 is a wasteful number, since it uses less digits than its factorization.

516821216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950066 (or 950058 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 516821216 is about 22733.7022061960. The cubic root of 516821216 is about 802.5032092599.

The spelling of 516821216 in words is "five hundred sixteen million, eight hundred twenty-one thousand, two hundred sixteen".