8505364331 has 2 divisors, whose sum is σ = 8505364332. Its totient is φ = 8505364330.

The previous prime is 8505364313. The next prime is 8505364339. The reversal of 8505364331 is 1334635058.

Together with previous prime (8505364313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8505364331 - 2²⁶ = 8438255467 is a prime.

It is a super-2 number, since 2×8505364331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8505364339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4252682165 + 4252682166.

It is an arithmetic number, because the mean of its divisors is an integer number (4252682166).

Almost surely, 2^8505364331 is an apocalyptic number.

8505364331 is a deficient number, since it is larger than the sum of its proper divisors (1).

8505364331 is an equidigital number, since it uses as much as digits as its factorization.

8505364331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 8505364331 is about 92224.5321538689. The cubic root of 8505364331 is about 2041.2567812444.

Adding to 8505364331 its reverse (1334635058), we get a palindrome (9839999389).

The spelling of 8505364331 in words is "eight billion, five hundred five million, three hundred sixty-four thousand, three hundred thirty-one".