221224559 has 2 divisors, whose sum is σ = 221224560. Its totient is φ = 221224558.

The previous prime is 221224537. The next prime is 221224573. The reversal of 221224559 is 955422122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221224559 - 2¹⁶ = 221159023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221224589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110612279 + 110612280.

It is an arithmetic number, because the mean of its divisors is an integer number (110612280).

Almost surely, 2^221224559 is an apocalyptic number.

221224559 is a deficient number, since it is larger than the sum of its proper divisors (1).

221224559 is an equidigital number, since it uses as much as digits as its factorization.

221224559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 221224559 is about 14873.6195661984. The cubic root of 221224559 is about 604.7990672125.

The spelling of 221224559 in words is "two hundred twenty-one million, two hundred twenty-four thousand, five hundred fifty-nine".