8216220752801 has 4 divisors (see below), whose sum is σ = 8217239006100. Its totient is φ = 8215202499504.

The previous prime is 8216220752783. The next prime is 8216220752807. The reversal of 8216220752801 is 1082570226128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 484617861025 + 7731602891776 = 696145^2 + 2780576^2 .

It is a cyclic number.

It is not a de Polignac number, because 8216220752801 - 2³⁴ = 8199040883617 is a prime.

It is a super-3 number, since 3×8216220752801³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8216220752807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509114546 + ... + 509130683.

It is an arithmetic number, because the mean of its divisors is an integer number (2054309751525).

Almost surely, 2^{8216220752801} is an apocalyptic number.

It is an amenable number.

8216220752801 is a deficient number, since it is larger than the sum of its proper divisors (1018253299).

8216220752801 is a wasteful number, since it uses less digits than its factorization.

8216220752801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018253298.

The product of its (nonzero) digits is 215040, while the sum is 44.

Adding to 8216220752801 its reverse (1082570226128), we get a palindrome (9298790978929).

The spelling of 8216220752801 in words is "eight trillion, two hundred sixteen billion, two hundred twenty million, seven hundred fifty-two thousand, eight hundred one".