10530221 has 8 divisors (see below), whose sum is σ = 11409720. Its totient is φ = 9718176.

The previous prime is 10530211. The next prime is 10530229. The reversal of 10530221 is 12203501.

It is a happy number.

10530221 is digitally balanced in base 2, 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 4 ways, for example, as 1464100 + 9066121 = 1210^2 + 3011^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10530221 is a prime.

It is a super-2 number, since 2×10530221² = 221771108617682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10530196 and 10530205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10530229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (1426215).

Almost surely, 2^10530221 is an apocalyptic number.

It is an amenable number.

10530221 is a deficient number, since it is larger than the sum of its proper divisors (879499).

10530221 is an frugal number, since it uses more digits than its factorization.

10530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832 (or 4806 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 10530221 is about 3245.0302001676. The cubic root of 10530221 is about 219.1858405993.

Adding to 10530221 its reverse (12203501), we get a palindrome (22733722).

The spelling of 10530221 in words is "ten million, five hundred thirty thousand, two hundred twenty-one".