220208491 has 2 divisors, whose sum is σ = 220208492. Its totient is φ = 220208490.

The previous prime is 220208479. The next prime is 220208501. The reversal of 220208491 is 194802022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220208491 - 2⁷ = 220208363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220208291) 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, 110104245 + 110104246.

It is an arithmetic number, because the mean of its divisors is an integer number (110104246).

Almost surely, 2^220208491 is an apocalyptic number.

220208491 is a deficient number, since it is larger than the sum of its proper divisors (1).

220208491 is an equidigital number, since it uses as much as digits as its factorization.

220208491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 220208491 is about 14839.4235400166. The cubic root of 220208491 is about 603.8717135773.

The spelling of 220208491 in words is "two hundred twenty million, two hundred eight thousand, four hundred ninety-one".