516219821 has 16 divisors (see below), whose sum is σ = 565469184. Its totient is φ = 468405504.

The previous prime is 516219817. The next prime is 516219827. The reversal of 516219821 is 128912615.

It is a cyclic number.

It is not a de Polignac number, because 516219821 - 2² = 516219817 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 (516219827) 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 15 ways as a sum of consecutive naturals, for example, 185180 + ... + 187946.

It is an arithmetic number, because the mean of its divisors is an integer number (35341824).

Almost surely, 2^516219821 is an apocalyptic number.

It is an amenable number.

516219821 is a deficient number, since it is larger than the sum of its proper divisors (49249363).

516219821 is a wasteful number, since it uses less digits than its factorization.

516219821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020.

The product of its digits is 8640, while the sum is 35.

The square root of 516219821 is about 22720.4714079616. The cubic root of 516219821 is about 802.1918128986.

The spelling of 516219821 in words is "five hundred sixteen million, two hundred nineteen thousand, eight hundred twenty-one".