22197609 has 24 divisors (see below), whose sum is σ = 36771072. Its totient is φ = 12640320.

The previous prime is 22197601. The next prime is 22197613. The reversal of 22197609 is 90679122.

It is not a de Polignac number, because 22197609 - 2³ = 22197601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22197601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28789 + ... + 29549.

It is an arithmetic number, because the mean of its divisors is an integer number (1532128).

Almost surely, 2^22197609 is an apocalyptic number.

It is an amenable number.

22197609 is a deficient number, since it is larger than the sum of its proper divisors (14573463).

22197609 is a wasteful number, since it uses less digits than its factorization.

22197609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 22197609 is about 4711.4338581795. The cubic root of 22197609 is about 281.0403854435.

The spelling of 22197609 in words is "twenty-two million, one hundred ninety-seven thousand, six hundred nine".