221422243 has 8 divisors (see below), whose sum is σ = 261217280. Its totient is φ = 183668040.

The previous prime is 221422241. The next prime is 221422247. The reversal of 221422243 is 342224122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221422243 - 2¹ = 221422241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221422241) 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 7 ways as a sum of consecutive naturals, for example, 509973 + ... + 510406.

It is an arithmetic number, because the mean of its divisors is an integer number (32652160).

Almost surely, 2^221422243 is an apocalyptic number.

221422243 is a deficient number, since it is larger than the sum of its proper divisors (39795037).

221422243 is a wasteful number, since it uses less digits than its factorization.

221422243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020417.

The product of its digits is 1536, while the sum is 22.

The square root of 221422243 is about 14880.2635393329. The cubic root of 221422243 is about 604.9791609970.

Adding to 221422243 its reverse (342224122), we get a palindrome (563646365).

The spelling of 221422243 in words is "two hundred twenty-one million, four hundred twenty-two thousand, two hundred forty-three".