220420297 has 2 divisors, whose sum is σ = 220420298. Its totient is φ = 220420296.

The previous prime is 220420253. The next prime is 220420313. The reversal of 220420297 is 792024022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215972416 + 4447881 = 14696^2 + 2109^2 .

It is a cyclic number.

It is not a de Polignac number, because 220420297 - 2⁷ = 220420169 is a prime.

It is not a weakly prime, because it can be changed into another prime (220420897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110210148 + 110210149.

It is an arithmetic number, because the mean of its divisors is an integer number (110210149).

Almost surely, 2^220420297 is an apocalyptic number.

It is an amenable number.

220420297 is a deficient number, since it is larger than the sum of its proper divisors (1).

220420297 is an equidigital number, since it uses as much as digits as its factorization.

220420297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 220420297 is about 14846.5584227457. The cubic root of 220420297 is about 604.0652614672.

The spelling of 220420297 in words is "two hundred twenty million, four hundred twenty thousand, two hundred ninety-seven".