10550209 has 4 divisors (see below), whose sum is σ = 10557316. Its totient is φ = 10543104.

The previous prime is 10550207. The next prime is 10550227. The reversal of 10550209 is 90205501.

10550209 is digitally balanced in base 2, 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 1113025 + 9437184 = 1055^2 + 3072^2 .

It is a cyclic number.

It is not a de Polignac number, because 10550209 - 2¹ = 10550207 is a prime.

It is a super-2 number, since 2×10550209² = 222613819887362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10550209.

It is not an unprimeable number, because it can be changed into a prime (10550201) 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, 384 + ... + 4609.

It is an arithmetic number, because the mean of its divisors is an integer number (2639329).

Almost surely, 2^10550209 is an apocalyptic number.

It is an amenable number.

10550209 is a deficient number, since it is larger than the sum of its proper divisors (7107).

10550209 is an equidigital number, since it uses as much as digits as its factorization.

10550209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 10550209 is about 3248.1085265120. The cubic root of 10550209 is about 219.3244359022.

The spelling of 10550209 in words is "ten million, five hundred fifty thousand, two hundred nine".