22209999 has 16 divisors (see below), whose sum is σ = 33911808. Its totient is φ = 12665952.

The previous prime is 22209997. The next prime is 22210033. The reversal of 22209999 is 99990222.

It is not a de Polignac number, because 22209999 - 2¹ = 22209997 is a prime.

22209999 is a modest number, since divided by 9999 gives 2220 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 22209999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22209997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16074 + ... + 17400.

It is an arithmetic number, because the mean of its divisors is an integer number (2119488).

Almost surely, 2^22209999 is an apocalyptic number.

22209999 is a deficient number, since it is larger than the sum of its proper divisors (11701809).

22209999 is a wasteful number, since it uses less digits than its factorization.

22209999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 22209999 is about 4712.7485610841. The cubic root of 22209999 is about 281.0926649888.

It can be divided in two parts, 2220999 and 9, that multiplied together give a palindrome (19988991).

The spelling of 22209999 in words is "twenty-two million, two hundred nine thousand, nine hundred ninety-nine".