5711221 has 4 divisors (see below), whose sum is σ = 5717452. Its totient is φ = 5704992.

The previous prime is 5711213. The next prime is 5711257. The reversal of 5711221 is 1221175.

5711221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 136900 + 5574321 = 370^2 + 2361^2 .

It is a cyclic number.

It is not a de Polignac number, because 5711221 - 2³ = 5711213 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 (5711261) 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 3 ways as a sum of consecutive naturals, for example, 1440 + ... + 3673.

It is an arithmetic number, because the mean of its divisors is an integer number (1429363).

Almost surely, 2^5711221 is an apocalyptic number.

It is an amenable number.

5711221 is a deficient number, since it is larger than the sum of its proper divisors (6231).

5711221 is a wasteful number, since it uses less digits than its factorization.

5711221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6230.

The product of its digits is 140, while the sum is 19.

The square root of 5711221 is about 2389.8161017116. The cubic root of 5711221 is about 178.7487397828.

Adding to 5711221 its reverse (1221175), we get a palindrome (6932396).

The spelling of 5711221 in words is "five million, seven hundred eleven thousand, two hundred twenty-one".