221223008 has 24 divisors (see below), whose sum is σ = 436952880. Its totient is φ = 110250880.

The previous prime is 221223001. The next prime is 221223029. The reversal of 221223008 is 800322122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221223001) 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, 1163 + ... + 21066.

It is an arithmetic number, because the mean of its divisors is an integer number (18206370).

Almost surely, 2^221223008 is an apocalyptic number.

It is an amenable number.

221223008 is a deficient number, since it is larger than the sum of its proper divisors (215729872).

221223008 is a wasteful number, since it uses less digits than its factorization.

221223008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22550 (or 22542 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 221223008 is about 14873.5674268146. The cubic root of 221223008 is about 604.7976537986.

The spelling of 221223008 in words is "two hundred twenty-one million, two hundred twenty-three thousand, eight".