22217697 has 6 divisors (see below), whose sum is σ = 32092242. Its totient is φ = 14811792.

The previous prime is 22217681. The next prime is 22217717. The reversal of 22217697 is 79671222.

It can be written as a sum of positive squares in only one way, i.e., 15374241 + 6843456 = 3921^2 + 2616^2 .

It is not a de Polignac number, because 22217697 - 2⁴ = 22217681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22217617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1234308 + ... + 1234325.

It is an arithmetic number, because the mean of its divisors is an integer number (5348707).

Almost surely, 2^22217697 is an apocalyptic number.

It is an amenable number.

22217697 is a deficient number, since it is larger than the sum of its proper divisors (9874545).

22217697 is a wasteful number, since it uses less digits than its factorization.

22217697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468639 (or 2468636 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 22217697 is about 4713.5652111751. The cubic root of 22217697 is about 281.1251368705.

The spelling of 22217697 in words is "twenty-two million, two hundred seventeen thousand, six hundred ninety-seven".