222227561 has 4 divisors (see below), whose sum is σ = 229396224. Its totient is φ = 215058900.

The previous prime is 222227557. The next prime is 222227581. The reversal of 222227561 is 165722222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222227561 - 2² = 222227557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222227581) 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 in 3 ways as a sum of consecutive naturals, for example, 3584285 + ... + 3584346.

It is an arithmetic number, because the mean of its divisors is an integer number (57349056).

Almost surely, 2^222227561 is an apocalyptic number.

It is an amenable number.

222227561 is a deficient number, since it is larger than the sum of its proper divisors (7168663).

222227561 is an equidigital number, since it uses as much as digits as its factorization.

222227561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7168662.

The product of its digits is 6720, while the sum is 29.

The square root of 222227561 is about 14907.2989169735. The cubic root of 222227561 is about 605.7117148401.

Adding to 222227561 its reverse (165722222), we get a palindrome (387949783).

The spelling of 222227561 in words is "two hundred twenty-two million, two hundred twenty-seven thousand, five hundred sixty-one".