221472266 has 8 divisors (see below), whose sum is σ = 338476644. Its totient is φ = 108646720.

The previous prime is 221472263. The next prime is 221472271. The reversal of 221472266 is 662274122.

It can be written as a sum of positive squares in 2 ways, for example, as 177449041 + 44023225 = 13321^2 + 6635^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221472263) 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, 1044575 + ... + 1044786.

Almost surely, 2^221472266 is an apocalyptic number.

221472266 is a deficient number, since it is larger than the sum of its proper divisors (117004378).

221472266 is a wasteful number, since it uses less digits than its factorization.

221472266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089416.

The product of its digits is 16128, while the sum is 32.

The square root of 221472266 is about 14881.9442950174. The cubic root of 221472266 is about 605.0247158812.

The spelling of 221472266 in words is "two hundred twenty-one million, four hundred seventy-two thousand, two hundred sixty-six".