8522557281 has 24 divisors (see below), whose sum is σ = 14071599360. Its totient is φ = 4869127296.

The previous prime is 8522557247. The next prime is 8522557391. The reversal of 8522557281 is 1827552258.

8522557281 is a `hidden beast` number, since 8 + 52 + 25 + 572 + 8 + 1 = 666.

It is not a de Polignac number, because 8522557281 - 2³¹ = 6375073633 is a prime.

It is a super-2 number, since 2×8522557281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8522537281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 482280 + ... + 499638.

It is an arithmetic number, because the mean of its divisors is an integer number (586316640).

Almost surely, 2^8522557281 is an apocalyptic number.

It is an amenable number.

8522557281 is a deficient number, since it is larger than the sum of its proper divisors (5549042079).

8522557281 is a wasteful number, since it uses less digits than its factorization.

8522557281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25165 (or 25162 counting only the distinct ones).

The product of its digits is 448000, while the sum is 45.

The square root of 8522557281 is about 92317.6975503614. The cubic root of 8522557281 is about 2042.6312708601.

The spelling of 8522557281 in words is "eight billion, five hundred twenty-two million, five hundred fifty-seven thousand, two hundred eighty-one".