8225502721 has 8 divisors (see below), whose sum is σ = 8423949888. Its totient is φ = 8029350000.

The previous prime is 8225502689. The next prime is 8225502739. The reversal of 8225502721 is 1272055228.

8225502721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8225502721 - 2⁵ = 8225502689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8225502221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566355 + ... + 580696.

It is an arithmetic number, because the mean of its divisors is an integer number (1052993736).

Almost surely, 2^8225502721 is an apocalyptic number.

It is an amenable number.

8225502721 is a deficient number, since it is larger than the sum of its proper divisors (198447167).

8225502721 is a wasteful number, since it uses less digits than its factorization.

8225502721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147223.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 8225502721 is about 90694.5572843266. The cubic root of 8225502721 is about 2018.6180399118.

Adding to 8225502721 its reverse (1272055228), we get a palindrome (9497557949).

The spelling of 8225502721 in words is "eight billion, two hundred twenty-five million, five hundred two thousand, seven hundred twenty-one".