22179909 has 8 divisors (see below), whose sum is σ = 30372640. Its totient is φ = 14386896.

The previous prime is 22179901. The next prime is 22179919. The reversal of 22179909 is 90997122.

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 22179909 - 2³ = 22179901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22179901) 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, 99799 + ... + 100020.

It is an arithmetic number, because the mean of its divisors is an integer number (3796580).

Almost surely, 2^22179909 is an apocalyptic number.

It is an amenable number.

22179909 is a deficient number, since it is larger than the sum of its proper divisors (8192731).

22179909 is a wasteful number, since it uses less digits than its factorization.

22179909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199859.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 22179909 is about 4709.5550745267. Note that the first 3 decimals coincide. The cubic root of 22179909 is about 280.9656666216.

The spelling of 22179909 in words is "twenty-two million, one hundred seventy-nine thousand, nine hundred nine".