8720320225 has 12 divisors (see below), whose sum is σ = 10861693696. Its totient is φ = 6944968080.

The previous prime is 8720320223. The next prime is 8720320241. The reversal of 8720320225 is 5220230278.

It is not a de Polignac number, because 8720320225 - 2¹ = 8720320223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8720320223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 776517 + ... + 787666.

Almost surely, 2^8720320225 is an apocalyptic number.

It is an amenable number.

8720320225 is a deficient number, since it is larger than the sum of its proper divisors (2141373471).

8720320225 is a wasteful number, since it uses less digits than its factorization.

8720320225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564416 (or 1564411 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 8720320225 is about 93382.6548401790. The cubic root of 8720320225 is about 2058.3101283351.

The spelling of 8720320225 in words is "eight billion, seven hundred twenty million, three hundred twenty thousand, two hundred twenty-five".