8311228085 has 4 divisors (see below), whose sum is σ = 9973473708. Its totient is φ = 6648982464.

The previous prime is 8311228031. The next prime is 8311228097. The reversal of 8311228085 is 5808221138.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5808221138 = 2 ⋅2904110569.

It can be written as a sum of positive squares in 2 ways, for example, as 2810484196 + 5500743889 = 53014^2 + 74167^2 .

It is a cyclic number.

It is not a de Polignac number, because 8311228085 - 2⁶ = 8311228021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831122804 + ... + 831122813.

It is an arithmetic number, because the mean of its divisors is an integer number (2493368427).

Almost surely, 2^8311228085 is an apocalyptic number.

It is an amenable number.

8311228085 is a deficient number, since it is larger than the sum of its proper divisors (1662245623).

8311228085 is a wasteful number, since it uses less digits than its factorization.

8311228085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662245622.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 8311228085 is about 91165.9370872696. The cubic root of 8311228085 is about 2025.6064299671.

The spelling of 8311228085 in words is "eight billion, three hundred eleven million, two hundred twenty-eight thousand, eighty-five".