5213221 has 4 divisors (see below), whose sum is σ = 5614252. Its totient is φ = 4812192.

The previous prime is 5213213. The next prime is 5213231. The reversal of 5213221 is 1223125.

5213221 = 1614² + 1615².

5213221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2608225 + 2604996 = 1615^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 5213221 - 2³ = 5213213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5213195 and 5213204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5213231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200496 + ... + 200521.

It is an arithmetic number, because the mean of its divisors is an integer number (1403563).

Almost surely, 2^5213221 is an apocalyptic number.

5213221 is the 1615-th centered square number.

It is an amenable number.

5213221 is a deficient number, since it is larger than the sum of its proper divisors (401031).

5213221 is a wasteful number, since it uses less digits than its factorization.

5213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401030.

The product of its digits is 120, while the sum is 16.

The square root of 5213221 is about 2283.2479059445. The cubic root of 5213221 is about 173.3945243357.

Adding to 5213221 its reverse (1223125), we get a palindrome (6436346).

The spelling of 5213221 in words is "five million, two hundred thirteen thousand, two hundred twenty-one".