8513545321 has 2 divisors, whose sum is σ = 8513545322. Its totient is φ = 8513545320.

The previous prime is 8513545297. The next prime is 8513545333. The reversal of 8513545321 is 1235453158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6251116096 + 2262429225 = 79064^2 + 47565^2 .

It is a cyclic number.

It is not a de Polignac number, because 8513545321 - 2¹³ = 8513537129 is a prime.

It is a super-3 number, since 3×8513545321³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8513545121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256772660 + 4256772661.

It is an arithmetic number, because the mean of its divisors is an integer number (4256772661).

Almost surely, 2^8513545321 is an apocalyptic number.

It is an amenable number.

8513545321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513545321 is an equidigital number, since it uses as much as digits as its factorization.

8513545321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 37.

The square root of 8513545321 is about 92268.8751475816. The cubic root of 8513545321 is about 2041.9110408903.

Adding to 8513545321 its reverse (1235453158), we get a palindrome (9748998479).

The spelling of 8513545321 in words is "eight billion, five hundred thirteen million, five hundred forty-five thousand, three hundred twenty-one".