22159509 has 12 divisors (see below), whose sum is σ = 30603456. Its totient is φ = 14261968.

The previous prime is 22159493. The next prime is 22159541. The reversal of 22159509 is 90595122.

It is not a de Polignac number, because 22159509 - 2⁴ = 22159493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22159509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22159549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1869 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (2550288).

Almost surely, 2^22159509 is an apocalyptic number.

22159509 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22159509 is a deficient number, since it is larger than the sum of its proper divisors (8443947).

22159509 is an equidigital number, since it uses as much as digits as its factorization.

22159509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8844 (or 8815 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 22159509 is about 4707.3887666094. The cubic root of 22159509 is about 280.8795006873.

The spelling of 22159509 in words is "twenty-two million, one hundred fifty-nine thousand, five hundred nine".