222326661 has 4 divisors (see below), whose sum is σ = 296435552. Its totient is φ = 148217772.

The previous prime is 222326659. The next prime is 222326677. The reversal of 222326661 is 166623222.

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 not a de Polignac number, because 222326661 - 2¹ = 222326659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222326681) 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, 37054441 + ... + 37054446.

It is an arithmetic number, because the mean of its divisors is an integer number (74108888).

Almost surely, 2^222326661 is an apocalyptic number.

It is an amenable number.

222326661 is a deficient number, since it is larger than the sum of its proper divisors (74108891).

222326661 is an equidigital number, since it uses as much as digits as its factorization.

222326661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74108890.

The product of its digits is 10368, while the sum is 30.

The square root of 222326661 is about 14910.6224216161. The cubic root of 222326661 is about 605.8017383430.

Adding to 222326661 its reverse (166623222), we get a palindrome (388949883).

The spelling of 222326661 in words is "two hundred twenty-two million, three hundred twenty-six thousand, six hundred sixty-one".