516214443221 has 8 divisors (see below), whose sum is σ = 538898754240. Its totient is φ = 493550149312.

The previous prime is 516214443179. The next prime is 516214443223. The reversal of 516214443221 is 122344412615.

It is a happy number.

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-516214443221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516214443223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4951556 + ... + 5054733.

It is an arithmetic number, because the mean of its divisors is an integer number (67362344280).

Almost surely, 2^516214443221 is an apocalyptic number.

It is an amenable number.

516214443221 is a deficient number, since it is larger than the sum of its proper divisors (22684311019).

516214443221 is a wasteful number, since it uses less digits than its factorization.

516214443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008555.

The product of its digits is 46080, while the sum is 35.

Adding to 516214443221 its reverse (122344412615), we get a palindrome (638558855836).

The spelling of 516214443221 in words is "five hundred sixteen billion, two hundred fourteen million, four hundred forty-three thousand, two hundred twenty-one".