2805306217 has 8 divisors (see below), whose sum is σ = 3260404800. Its totient is φ = 2363792784.

The previous prime is 2805306211. The next prime is 2805306233. The reversal of 2805306217 is 7126035082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2805306217 - 2¹¹ = 2805304169 is a prime.

It is a super-2 number, since 2×2805306217² = 15739485942277702178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2805306211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395842 + ... + 3396667.

It is an arithmetic number, because the mean of its divisors is an integer number (407550600).

Almost surely, 2^2805306217 is an apocalyptic number.

It is an amenable number.

2805306217 is a deficient number, since it is larger than the sum of its proper divisors (455098583).

2805306217 is an equidigital number, since it uses as much as digits as its factorization.

2805306217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6792575.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 2805306217 is about 52965.1415272347. The cubic root of 2805306217 is about 1410.3495297309.

The spelling of 2805306217 in words is "two billion, eight hundred five million, three hundred six thousand, two hundred seventeen".