222082561 has 4 divisors (see below), whose sum is σ = 226272852. Its totient is φ = 217892272.

The previous prime is 222082559. The next prime is 222082613. The reversal of 222082561 is 165280222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59367025 + 162715536 = 7705^2 + 12756^2 .

It is a cyclic number.

It is not a de Polignac number, because 222082561 - 2¹ = 222082559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222082361) 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 in 3 ways as a sum of consecutive naturals, for example, 2095066 + ... + 2095171.

It is an arithmetic number, because the mean of its divisors is an integer number (56568213).

Almost surely, 2^222082561 is an apocalyptic number.

It is an amenable number.

222082561 is a deficient number, since it is larger than the sum of its proper divisors (4190291).

222082561 is an equidigital number, since it uses as much as digits as its factorization.

222082561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190290.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 222082561 is about 14902.4347339621. The cubic root of 222082561 is about 605.5799470441.

The spelling of 222082561 in words is "two hundred twenty-two million, eighty-two thousand, five hundred sixty-one".