22481809 has 8 divisors (see below), whose sum is σ = 25729088. Its totient is φ = 19243440.

The previous prime is 22481801. The next prime is 22481813. The reversal of 22481809 is 90818422.

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 22481809 - 2³ = 22481801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22481801) 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, 4579 + ... + 8119.

It is an arithmetic number, because the mean of its divisors is an integer number (3216136).

Almost surely, 2^22481809 is an apocalyptic number.

It is an amenable number.

22481809 is a deficient number, since it is larger than the sum of its proper divisors (3247279).

22481809 is an equidigital number, since it uses as much as digits as its factorization.

22481809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 22481809 is about 4741.4986027626. The cubic root of 22481809 is about 282.2347064340.

The spelling of 22481809 in words is "twenty-two million, four hundred eighty-one thousand, eight hundred nine".