221604547859 has 2 divisors, whose sum is σ = 221604547860. Its totient is φ = 221604547858.

The previous prime is 221604547849. The next prime is 221604547877. The reversal of 221604547859 is 958745406122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221604547859 - 2³² = 217309580563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221604547859.

It is not a weakly prime, because it can be changed into another prime (221604547849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110802273929 + 110802273930.

It is an arithmetic number, because the mean of its divisors is an integer number (110802273930).

Almost surely, 2^221604547859 is an apocalyptic number.

221604547859 is a deficient number, since it is larger than the sum of its proper divisors (1).

221604547859 is an equidigital number, since it uses as much as digits as its factorization.

221604547859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 221604547859 in words is "two hundred twenty-one billion, six hundred four million, five hundred forty-seven thousand, eight hundred fifty-nine".