220220197 has 2 divisors, whose sum is σ = 220220198. Its totient is φ = 220220196.

The previous prime is 220220153. The next prime is 220220201. The reversal of 220220197 is 791022022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133841761 + 86378436 = 11569^2 + 9294^2 .

It is a cyclic number.

It is not a de Polignac number, because 220220197 - 2⁷ = 220220069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220220107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110098 + 110110099.

It is an arithmetic number, because the mean of its divisors is an integer number (110110099).

Almost surely, 2^220220197 is an apocalyptic number.

It is an amenable number.

220220197 is a deficient number, since it is larger than the sum of its proper divisors (1).

220220197 is an equidigital number, since it uses as much as digits as its factorization.

220220197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 220220197 is about 14839.8179571045. The cubic root of 220220197 is about 603.8824137355.

The spelling of 220220197 in words is "two hundred twenty million, two hundred twenty thousand, one hundred ninety-seven".