220224209 has 2 divisors, whose sum is σ = 220224210. Its totient is φ = 220224208.

The previous prime is 220224157. The next prime is 220224211. The reversal of 220224209 is 902422022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215062225 + 5161984 = 14665^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 220224209 - 2⁸ = 220223953 is a prime.

Together with 220224211, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_12134192 and since 220224209 and 12134192 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (220224509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110112104 + 110112105.

It is an arithmetic number, because the mean of its divisors is an integer number (110112105).

Almost surely, 2^220224209 is an apocalyptic number.

It is an amenable number.

220224209 is a deficient number, since it is larger than the sum of its proper divisors (1).

220224209 is an equidigital number, since it uses as much as digits as its factorization.

220224209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 220224209 is about 14839.9531333492. The cubic root of 220224209 is about 603.8860809158.

The spelling of 220224209 in words is "two hundred twenty million, two hundred twenty-four thousand, two hundred nine".