220505443 has 2 divisors, whose sum is σ = 220505444. Its totient is φ = 220505442.

The previous prime is 220505437. The next prime is 220505447. The reversal of 220505443 is 344505022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220505443 - 2⁹ = 220504931 is a prime.

It is not a weakly prime, because it can be changed into another prime (220505447) 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, 110252721 + 110252722.

It is an arithmetic number, because the mean of its divisors is an integer number (110252722).

Almost surely, 2^220505443 is an apocalyptic number.

220505443 is a deficient number, since it is larger than the sum of its proper divisors (1).

220505443 is an equidigital number, since it uses as much as digits as its factorization.

220505443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 220505443 is about 14849.4256791298. The cubic root of 220505443 is about 604.1430327677.

The spelling of 220505443 in words is "two hundred twenty million, five hundred five thousand, four hundred forty-three".