221233231 has 8 divisors (see below), whose sum is σ = 224640000. Its totient is φ = 217834680.

The previous prime is 221233163. The next prime is 221233241. The reversal of 221233231 is 132332122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221233231 is a prime.

It is a super-2 number, since 2×221233231² = 97888284997398722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221233199 and 221233208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221233241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72270 + ... + 75268.

It is an arithmetic number, because the mean of its divisors is an integer number (28080000).

Almost surely, 2^221233231 is an apocalyptic number.

221233231 is a deficient number, since it is larger than the sum of its proper divisors (3406769).

221233231 is a wasteful number, since it uses less digits than its factorization.

221233231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109.

The product of its digits is 432, while the sum is 19.

The square root of 221233231 is about 14873.9110861938. The cubic root of 221233231 is about 604.8069698145.

Adding to 221233231 its reverse (132332122), we get a palindrome (353565353).

The spelling of 221233231 in words is "two hundred twenty-one million, two hundred thirty-three thousand, two hundred thirty-one".