5221521 has 6 divisors (see below), whose sum is σ = 7542210. Its totient is φ = 3481008.

The previous prime is 5221501. The next prime is 5221543. The reversal of 5221521 is 1251225.

5221521 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 1535121 = 1920^2 + 1239^2 .

It is not a de Polignac number, because 5221521 - 2⁶ = 5221457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5221494 and 5221503.

It is not an unprimeable number, because it can be changed into a prime (5221501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 290076 + ... + 290093.

It is an arithmetic number, because the mean of its divisors is an integer number (1257035).

Almost surely, 2^5221521 is an apocalyptic number.

It is an amenable number.

5221521 is a deficient number, since it is larger than the sum of its proper divisors (2320689).

5221521 is a wasteful number, since it uses less digits than its factorization.

5221521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580175 (or 580172 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 5221521 is about 2285.0647693227. The cubic root of 5221521 is about 173.4864963592.

Adding to 5221521 its reverse (1251225), we get a palindrome (6472746).

The spelling of 5221521 in words is "five million, two hundred twenty-one thousand, five hundred twenty-one".