22198917 has 16 divisors (see below), whose sum is σ = 32655168. Its totient is φ = 13326720.

The previous prime is 22198907. The next prime is 22198919. The reversal of 22198917 is 71989122.

It is not a de Polignac number, because 22198917 - 2¹⁴ = 22182533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22198919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5343 + ... + 8540.

It is an arithmetic number, because the mean of its divisors is an integer number (2040948).

Almost surely, 2^22198917 is an apocalyptic number.

It is an amenable number.

22198917 is a deficient number, since it is larger than the sum of its proper divisors (10456251).

22198917 is a wasteful number, since it uses less digits than its factorization.

22198917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13940.

The product of its digits is 18144, while the sum is 39.

The square root of 22198917 is about 4711.5726673798. The cubic root of 22198917 is about 281.0459054615.

The spelling of 22198917 in words is "twenty-two million, one hundred ninety-eight thousand, nine hundred seventeen".