220555009 has 2 divisors, whose sum is σ = 220555010. Its totient is φ = 220555008.

The previous prime is 220555003. The next prime is 220555061. The reversal of 220555009 is 900555022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217415025 + 3139984 = 14745^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 220555009 - 2⁵ = 220554977 is a prime.

It is not a weakly prime, because it can be changed into another prime (220555003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110277504 + 110277505.

It is an arithmetic number, because the mean of its divisors is an integer number (110277505).

Almost surely, 2^220555009 is an apocalyptic number.

It is an amenable number.

220555009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220555009 is an equidigital number, since it uses as much as digits as its factorization.

220555009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 220555009 is about 14851.0945387874. The cubic root of 220555009 is about 604.1882965183.

The spelling of 220555009 in words is "two hundred twenty million, five hundred fifty-five thousand, nine".