220223009 has 2 divisors, whose sum is σ = 220223010. Its totient is φ = 220223008.

The previous prime is 220222967. The next prime is 220223011. The reversal of 220223009 is 900322022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137358400 + 82864609 = 11720^2 + 9103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220223009 is a prime.

Together with 220223011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220223089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110111504 + 110111505.

It is an arithmetic number, because the mean of its divisors is an integer number (110111505).

Almost surely, 2^220223009 is an apocalyptic number.

It is an amenable number.

220223009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220223009 is an equidigital number, since it uses as much as digits as its factorization.

220223009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 220223009 is about 14839.9127018996. The cubic root of 220223009 is about 603.8849840570.

The spelling of 220223009 in words is "two hundred twenty million, two hundred twenty-three thousand, nine".