220321009 has 2 divisors, whose sum is σ = 220321010. Its totient is φ = 220321008.

The previous prime is 220320943. The next prime is 220321021. The reversal of 220321009 is 900123022.

It is a happy number.

220321009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121616784 + 98704225 = 11028^2 + 9935^2 .

It is a cyclic number.

It is not a de Polignac number, because 220321009 - 2¹¹ = 220318961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220321039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110160504 + 110160505.

It is an arithmetic number, because the mean of its divisors is an integer number (110160505).

Almost surely, 2^220321009 is an apocalyptic number.

It is an amenable number.

220321009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220321009 is an equidigital number, since it uses as much as digits as its factorization.

220321009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 220321009 is about 14843.2142408577. The cubic root of 220321009 is about 603.9745477411.

The spelling of 220321009 in words is "two hundred twenty million, three hundred twenty-one thousand, nine".