221222006 has 8 divisors (see below), whose sum is σ = 331997400. Its totient is φ = 110556208.

The previous prime is 221221967. The next prime is 221222009. The reversal of 221222006 is 600222122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22151 + ... + 30546.

It is an arithmetic number, because the mean of its divisors is an integer number (41499675).

Almost surely, 2^221222006 is an apocalyptic number.

221222006 is a deficient number, since it is larger than the sum of its proper divisors (110775394).

221222006 is a wasteful number, since it uses less digits than its factorization.

221222006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54798.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221222006 is about 14873.5337428602. The cubic root of 221222006 is about 604.7967406806.

Adding to 221222006 its reverse (600222122), we get a palindrome (821444128).

The spelling of 221222006 in words is "two hundred twenty-one million, two hundred twenty-two thousand, six".