22135209 has 16 divisors (see below), whose sum is σ = 32071680. Its totient is φ = 13528080.

The previous prime is 22135193. The next prime is 22135219. The reversal of 22135209 is 90253122.

It is not a de Polignac number, because 22135209 - 2⁴ = 22135193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22135219) 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 15 ways as a sum of consecutive naturals, for example, 4497 + ... + 8030.

It is an arithmetic number, because the mean of its divisors is an integer number (2004480).

Almost surely, 2^22135209 is an apocalyptic number.

It is an amenable number.

22135209 is a deficient number, since it is larger than the sum of its proper divisors (9936471).

22135209 is a wasteful number, since it uses less digits than its factorization.

22135209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12580.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 22135209 is about 4704.8070098570. The cubic root of 22135209 is about 280.7767928118.

It can be divided in two parts, 2 and 2135209, that added together give a triangular number (2135211 = T₂₀₆₆).

The spelling of 22135209 in words is "twenty-two million, one hundred thirty-five thousand, two hundred nine".