222968191 has 4 divisors (see below), whose sum is σ = 227175192. Its totient is φ = 218761192.

The previous prime is 222968183. The next prime is 222968197. The reversal of 222968191 is 191869222.

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 222968191 - 2³ = 222968183 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222968197) 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, 2103421 + ... + 2103526.

It is an arithmetic number, because the mean of its divisors is an integer number (56793798).

Almost surely, 2^222968191 is an apocalyptic number.

222968191 is a deficient number, since it is larger than the sum of its proper divisors (4207001).

222968191 is an equidigital number, since it uses as much as digits as its factorization.

222968191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207000.

The product of its digits is 31104, while the sum is 40.

The square root of 222968191 is about 14932.1194409903. The cubic root of 222968191 is about 606.3838649234.

The spelling of 222968191 in words is "two hundred twenty-two million, nine hundred sixty-eight thousand, one hundred ninety-one".