222244391 has 4 divisors (see below), whose sum is σ = 222614784. Its totient is φ = 221874000.

The previous prime is 222244381. The next prime is 222244397. The reversal of 222244391 is 193442222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193442222 = 2 ⋅96721111.

It is a cyclic number.

It is not a de Polignac number, because 222244391 - 2¹⁰ = 222243367 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 (222244397) 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, 184295 + ... + 185496.

It is an arithmetic number, because the mean of its divisors is an integer number (55653696).

Almost surely, 2^222244391 is an apocalyptic number.

222244391 is a deficient number, since it is larger than the sum of its proper divisors (370393).

222244391 is an equidigital number, since it uses as much as digits as its factorization.

222244391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370392.

The product of its digits is 6912, while the sum is 29.

The square root of 222244391 is about 14907.8633948665. The cubic root of 222244391 is about 605.7270052790.

The spelling of 222244391 in words is "two hundred twenty-two million, two hundred forty-four thousand, three hundred ninety-one".