8521045081 has 2 divisors, whose sum is σ = 8521045082. Its totient is φ = 8521045080.

The previous prime is 8521045067. The next prime is 8521045109. The reversal of 8521045081 is 1805401258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8453147481 + 67897600 = 91941^2 + 8240^2 .

It is a cyclic number.

It is not a de Polignac number, because 8521045081 - 2¹³ = 8521036889 is a prime.

It is a super-2 number, since 2×8521045081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8521045021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260522540 + 4260522541.

It is an arithmetic number, because the mean of its divisors is an integer number (4260522541).

Almost surely, 2^8521045081 is an apocalyptic number.

It is an amenable number.

8521045081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8521045081 is an equidigital number, since it uses as much as digits as its factorization.

8521045081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 8521045081 is about 92309.5069914253. The cubic root of 8521045081 is about 2042.5104522836.

The spelling of 8521045081 in words is "eight billion, five hundred twenty-one million, forty-five thousand, eighty-one".