22197229 has 4 divisors (see below), whose sum is σ = 22561180. Its totient is φ = 21833280.

The previous prime is 22197193. The next prime is 22197233. The reversal of 22197229 is 92279122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 248004 + 21949225 = 498^2 + 4685^2 .

It is a cyclic number.

It is not a de Polignac number, because 22197229 - 2⁷ = 22197101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22197194 and 22197203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22197239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181884 + ... + 182005.

It is an arithmetic number, because the mean of its divisors is an integer number (5640295).

Almost surely, 2^22197229 is an apocalyptic number.

It is an amenable number.

22197229 is a deficient number, since it is larger than the sum of its proper divisors (363951).

22197229 is an equidigital number, since it uses as much as digits as its factorization.

22197229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363950.

The product of its digits is 9072, while the sum is 34.

The square root of 22197229 is about 4711.3935305809. The cubic root of 22197229 is about 281.0387817279.

The spelling of 22197229 in words is "twenty-two million, one hundred ninety-seven thousand, two hundred twenty-nine".