8223052721 has 8 divisors (see below), whose sum is σ = 8867397504. Its totient is φ = 7580394000.

The previous prime is 8223052681. The next prime is 8223052741. The reversal of 8223052721 is 1272503228.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8223052721 - 2⁶ = 8223052657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8223052741) 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 7 ways as a sum of consecutive naturals, for example, 411371 + ... + 430896.

It is an arithmetic number, because the mean of its divisors is an integer number (1108424688).

Almost surely, 2^8223052721 is an apocalyptic number.

It is an amenable number.

8223052721 is a deficient number, since it is larger than the sum of its proper divisors (644344783).

8223052721 is a wasteful number, since it uses less digits than its factorization.

8223052721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843031.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 8223052721 is about 90681.0494039411. The cubic root of 8223052721 is about 2018.4176020998.

Adding to 8223052721 its reverse (1272503228), we get a palindrome (9495555949).

The spelling of 8223052721 in words is "eight billion, two hundred twenty-three million, fifty-two thousand, seven hundred twenty-one".