221232233 has 4 divisors (see below), whose sum is σ = 222378708. Its totient is φ = 220085760.

The previous prime is 221232223. The next prime is 221232247. The reversal of 221232233 is 332232122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65157184 + 156075049 = 8072^2 + 12493^2 .

It is a cyclic number.

It is not a de Polignac number, because 221232233 - 2⁸ = 221231977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221232223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 572948 + ... + 573333.

It is an arithmetic number, because the mean of its divisors is an integer number (55594677).

Almost surely, 2^221232233 is an apocalyptic number.

It is an amenable number.

221232233 is a deficient number, since it is larger than the sum of its proper divisors (1146475).

221232233 is a wasteful number, since it uses less digits than its factorization.

221232233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146474.

The product of its digits is 864, while the sum is 20.

The square root of 221232233 is about 14873.8775374816. The cubic root of 221232233 is about 604.8060603697.

Adding to 221232233 its reverse (332232122), we get a palindrome (553464355).

The spelling of 221232233 in words is "two hundred twenty-one million, two hundred thirty-two thousand, two hundred thirty-three".