221232466 has 32 divisors (see below), whose sum is σ = 429932160. Its totient is φ = 82912896.

The previous prime is 221232449. The next prime is 221232481. The reversal of 221232466 is 664232122.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28531 + ... + 35446.

It is an arithmetic number, because the mean of its divisors is an integer number (13435380).

Almost surely, 2^221232466 is an apocalyptic number.

221232466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

221232466 is a deficient number, since it is larger than the sum of its proper divisors (208699694).

221232466 is a wasteful number, since it uses less digits than its factorization.

221232466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64018.

The product of its digits is 6912, while the sum is 28.

The square root of 221232466 is about 14873.8853700034. The cubic root of 221232466 is about 604.8062726952.

Adding to 221232466 its reverse (664232122), we get a palindrome (885464588).

The spelling of 221232466 in words is "two hundred twenty-one million, two hundred thirty-two thousand, four hundred sixty-six".