22471809 has 8 divisors (see below), whose sum is σ = 30373152. Its totient is φ = 14775840.

The previous prime is 22471789. The next prime is 22471817. The reversal of 22471809 is 90817422.

It is a happy number.

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

It is not a de Polignac number, because 22471809 - 2¹⁹ = 21947521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22471809.

It is not an unprimeable number, because it can be changed into a prime (22471849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51087 + ... + 51524.

It is an arithmetic number, because the mean of its divisors is an integer number (3796644).

Almost surely, 2^22471809 is an apocalyptic number.

It is an amenable number.

22471809 is a deficient number, since it is larger than the sum of its proper divisors (7901343).

22471809 is a wasteful number, since it uses less digits than its factorization.

22471809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102687.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 22471809 is about 4740.4439665500. The cubic root of 22471809 is about 282.1928538466.

The spelling of 22471809 in words is "twenty-two million, four hundred seventy-one thousand, eight hundred nine".