22155009 has 8 divisors (see below), whose sum is σ = 29705760. Its totient is φ = 14687136.

The previous prime is 22154999. The next prime is 22155011. The reversal of 22155009 is 90055122.

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

It is not a de Polignac number, because 22155009 - 2¹⁵ = 22122241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22155009.

It is not an unprimeable number, because it can be changed into a prime (22155059) 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, 20092 + ... + 21165.

It is an arithmetic number, because the mean of its divisors is an integer number (3713220).

Almost surely, 2^22155009 is an apocalyptic number.

It is an amenable number.

22155009 is a deficient number, since it is larger than the sum of its proper divisors (7550751).

22155009 is a wasteful number, since it uses less digits than its factorization.

22155009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41439.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 22155009 is about 4706.9107703461. The cubic root of 22155009 is about 280.8604863773.

The spelling of 22155009 in words is "twenty-two million, one hundred fifty-five thousand, nine".