222445123 has 4 divisors (see below), whose sum is σ = 222533568. Its totient is φ = 222356680.

The previous prime is 222445099. The next prime is 222445151. The reversal of 222445123 is 321544222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222445123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222445183) 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, 40336 + ... + 45517.

It is an arithmetic number, because the mean of its divisors is an integer number (55633392).

Almost surely, 2^222445123 is an apocalyptic number.

222445123 is a deficient number, since it is larger than the sum of its proper divisors (88445).

222445123 is an equidigital number, since it uses as much as digits as its factorization.

222445123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88444.

The product of its digits is 3840, while the sum is 25.

The square root of 222445123 is about 14914.5942955214. The cubic root of 222445123 is about 605.9093153994.

Adding to 222445123 its reverse (321544222), we get a palindrome (543989345).

Subtracting 222445123 from its reverse (321544222), we obtain a palindrome (99099099).

The spelling of 222445123 in words is "two hundred twenty-two million, four hundred forty-five thousand, one hundred twenty-three".