221040233 has 8 divisors (see below), whose sum is σ = 228889800. Its totient is φ = 213205888.

The previous prime is 221040229. The next prime is 221040241. The reversal of 221040233 is 332040122.

It can be written as a sum of positive squares in 4 ways, for example, as 458329 + 220581904 = 677^2 + 14852^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 221040233 - 2² = 221040229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221070233) 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, 31403 + ... + 37791.

It is an arithmetic number, because the mean of its divisors is an integer number (28611225).

Almost surely, 2^221040233 is an apocalyptic number.

It is an amenable number.

221040233 is a deficient number, since it is larger than the sum of its proper divisors (7849567).

221040233 is a wasteful number, since it uses less digits than its factorization.

221040233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611.

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

The square root of 221040233 is about 14867.4218679635. The cubic root of 221040233 is about 604.6310461305.

Adding to 221040233 its reverse (332040122), we get a palindrome (553080355).

The spelling of 221040233 in words is "two hundred twenty-one million, forty thousand, two hundred thirty-three".