8525662217 has 4 divisors (see below), whose sum is σ = 8579965956. Its totient is φ = 8471358480.

The previous prime is 8525662213. The next prime is 8525662247. The reversal of 8525662217 is 7122665258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7122665258 = 2 ⋅3561332629.

It can be written as a sum of positive squares in 2 ways, for example, as 5443635961 + 3082026256 = 73781^2 + 55516^2 .

It is a cyclic number.

It is not a de Polignac number, because 8525662217 - 2² = 8525662213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8525662213) 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, 27151634 + ... + 27151947.

It is an arithmetic number, because the mean of its divisors is an integer number (2144991489).

Almost surely, 2^8525662217 is an apocalyptic number.

It is an amenable number.

8525662217 is a deficient number, since it is larger than the sum of its proper divisors (54303739).

8525662217 is a wasteful number, since it uses less digits than its factorization.

8525662217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54303738.

The product of its digits is 403200, while the sum is 44.

The square root of 8525662217 is about 92334.5125995692. The cubic root of 8525662217 is about 2042.8792977184.

The spelling of 8525662217 in words is "eight billion, five hundred twenty-five million, six hundred sixty-two thousand, two hundred seventeen".