10553221 has 4 divisors (see below), whose sum is σ = 12060832. Its totient is φ = 9045612.

The previous prime is 10553219. The next prime is 10553233. The reversal of 10553221 is 12235501.

10553221 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12235501 = 71 ⋅172331.

It is a cyclic number.

It is not a de Polignac number, because 10553221 - 2¹ = 10553219 is a prime.

It is a super-2 number, since 2×10553221² = 222740946949682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10553261) 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, 753795 + ... + 753808.

It is an arithmetic number, because the mean of its divisors is an integer number (3015208).

Almost surely, 2^10553221 is an apocalyptic number.

It is an amenable number.

10553221 is a deficient number, since it is larger than the sum of its proper divisors (1507611).

10553221 is an equidigital number, since it uses as much as digits as its factorization.

10553221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507610.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 10553221 is about 3248.5721478828. The cubic root of 10553221 is about 219.3453057050.

Adding to 10553221 its reverse (12235501), we get a palindrome (22788722).

The spelling of 10553221 in words is "ten million, five hundred fifty-three thousand, two hundred twenty-one".