5811825221 has 4 divisors (see below), whose sum is σ = 5816096844. Its totient is φ = 5807553600.

The previous prime is 5811825197. The next prime is 5811825323. The reversal of 5811825221 is 1225281185.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 338044996 + 5473780225 = 18386^2 + 73985^2 .

It is a cyclic number.

It is not a de Polignac number, because 5811825221 - 2²⁶ = 5744716357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5811828221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133770 + ... + 2136491.

It is an arithmetic number, because the mean of its divisors is an integer number (1454024211).

Almost surely, 2^5811825221 is an apocalyptic number.

It is an amenable number.

5811825221 is a deficient number, since it is larger than the sum of its proper divisors (4271623).

5811825221 is a wasteful number, since it uses less digits than its factorization.

5811825221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271622.

The product of its digits is 12800, while the sum is 35.

The square root of 5811825221 is about 76235.3279064241. The cubic root of 5811825221 is about 1797.9220074575.

The spelling of 5811825221 in words is "five billion, eight hundred eleven million, eight hundred twenty-five thousand, two hundred twenty-one".