10221809 has 8 divisors (see below), whose sum is σ = 11195520. Its totient is φ = 9274896.

The previous prime is 10221803. The next prime is 10221853. The reversal of 10221809 is 90812201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10221809 - 2⁴ = 10221793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221803) 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, 5897 + ... + 7430.

It is an arithmetic number, because the mean of its divisors is an integer number (1399440).

Almost surely, 2^10221809 is an apocalyptic number.

It is an amenable number.

10221809 is a deficient number, since it is larger than the sum of its proper divisors (973711).

10221809 is a wasteful number, since it uses less digits than its factorization.

10221809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13399.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 10221809 is about 3197.1563927966. The cubic root of 10221809 is about 217.0247446423.

The spelling of 10221809 in words is "ten million, two hundred twenty-one thousand, eight hundred nine".