220880321 has 2 divisors, whose sum is σ = 220880322. Its totient is φ = 220880320.

The previous prime is 220880299. The next prime is 220880323. The reversal of 220880321 is 123088022.

220880321 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., 155351296 + 65529025 = 12464^2 + 8095^2 .

It is a cyclic number.

It is not a de Polignac number, because 220880321 - 2¹⁰ = 220879297 is a prime.

It is a Sophie Germain prime.

Together with 220880323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (220880323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110440160 + 110440161.

It is an arithmetic number, because the mean of its divisors is an integer number (110440161).

Almost surely, 2^220880321 is an apocalyptic number.

It is an amenable number.

220880321 is a deficient number, since it is larger than the sum of its proper divisors (1).

220880321 is an equidigital number, since it uses as much as digits as its factorization.

220880321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 220880321 is about 14862.0429618542. The cubic root of 220880321 is about 604.4852037738.

The spelling of 220880321 in words is "two hundred twenty million, eight hundred eighty thousand, three hundred twenty-one".