221223230 has 16 divisors (see below), whose sum is σ = 400589280. Its totient is φ = 87958752.

The previous prime is 221223221. The next prime is 221223241. The reversal of 221223230 is 32322122.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221223199 and 221223208.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 64565 + ... + 67904.

It is an arithmetic number, because the mean of its divisors is an integer number (25036830).

Almost surely, 2^221223230 is an apocalyptic number.

221223230 is a deficient number, since it is larger than the sum of its proper divisors (179366050).

221223230 is a wasteful number, since it uses less digits than its factorization.

221223230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132643.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 221223230 is about 14873.5748897163. The cubic root of 221223230 is about 604.7978561059.

Adding to 221223230 its reverse (32322122), we get a palindrome (253545352).

It can be divided in two parts, 22122 and 3230, that added together give a palindrome (25352).

The spelling of 221223230 in words is "two hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty".