10220809 has 9 divisors (see below), whose sum is σ = 10761933. Its totient is φ = 9706092.

The previous prime is 10220807. The next prime is 10220827. The reversal of 10220809 is 90802201.

The square root of 10220809 is 3197.

It is a perfect power (a square), and thus also a powerful number.

10220809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10220809 - 2¹ = 10220807 is a prime.

It is a super-2 number, since 2×10220809² = 208929873228962, 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 10220809.

It is not an unprimeable number, because it can be changed into a prime (10220807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 73462 + ... + 73600.

Almost surely, 2^10220809 is an apocalyptic number.

10220809 is the 3197-th square number.

10220809 is the 1599-th centered octagonal number.

It is an amenable number.

10220809 is a deficient number, since it is larger than the sum of its proper divisors (541124).

10220809 is an frugal number, since it uses more digits than its factorization.

10220809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The cubic root of 10220809 is about 217.0176672315.

The spelling of 10220809 in words is "ten million, two hundred twenty thousand, eight hundred nine".