5811221185 has 16 divisors (see below), whose sum is σ = 8694191232. Its totient is φ = 3622579200.

The previous prime is 5811221183. The next prime is 5811221261.

It is a happy number.

5811221185 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5811221185 - 2¹ = 5811221183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5811221185.

It is not an unprimeable number, because it can be changed into a prime (5811221183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7546656 + ... + 7547425.

It is an arithmetic number, because the mean of its divisors is an integer number (543386952).

Almost surely, 2^5811221185 is an apocalyptic number.

5811221185 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5811221185 is a deficient number, since it is larger than the sum of its proper divisors (2882970047).

5811221185 is a wasteful number, since it uses less digits than its factorization.

5811221185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15094104.

The product of its digits is 6400, while the sum is 34.

The square root of 5811221185 is about 76231.3661493745. The cubic root of 5811221185 is about 1797.8597179470.

It can be divided in two parts, 58112 and 21185, that added together give a palindrome (79297).

The spelling of 5811221185 in words is "five billion, eight hundred eleven million, two hundred twenty-one thousand, one hundred eighty-five".