222305623 has 4 divisors (see below), whose sum is σ = 224984088. Its totient is φ = 219627160.

The previous prime is 222305593. The next prime is 222305627. The reversal of 222305623 is 326503222.

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

It is a cyclic number.

It is not a de Polignac number, because 222305623 - 2¹³ = 222297431 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 (222305627) 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, 1339108 + ... + 1339273.

It is an arithmetic number, because the mean of its divisors is an integer number (56246022).

Almost surely, 2^222305623 is an apocalyptic number.

222305623 is a deficient number, since it is larger than the sum of its proper divisors (2678465).

222305623 is an equidigital number, since it uses as much as digits as its factorization.

222305623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678464.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 222305623 is about 14909.9169347116. The cubic root of 222305623 is about 605.7826294352.

Adding to 222305623 its reverse (326503222), we get a palindrome (548808845).

The spelling of 222305623 in words is "two hundred twenty-two million, three hundred five thousand, six hundred twenty-three".