222489791 has 4 divisors (see below), whose sum is σ = 234199800. Its totient is φ = 210779784.

The previous prime is 222489779. The next prime is 222489793. The reversal of 222489791 is 197984222.

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-222489791 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 (222489793) 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, 5854976 + ... + 5855013.

It is an arithmetic number, because the mean of its divisors is an integer number (58549950).

Almost surely, 2^222489791 is an apocalyptic number.

222489791 is a deficient number, since it is larger than the sum of its proper divisors (11710009).

222489791 is a wasteful number, since it uses less digits than its factorization.

222489791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11710008.

The product of its digits is 145152, while the sum is 44.

The square root of 222489791 is about 14916.0916797933. The cubic root of 222489791 is about 605.9498691407.

The spelling of 222489791 in words is "two hundred twenty-two million, four hundred eighty-nine thousand, seven hundred ninety-one".