221343233 has 8 divisors (see below), whose sum is σ = 225345120. Its totient is φ = 217376640.

The previous prime is 221343173. The next prime is 221343251. The reversal of 221343233 is 332343122.

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 221343233 - 2²⁶ = 154234369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221343199 and 221343208.

It is not an unprimeable number, because it can be changed into a prime (221343253) 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, 3998 + ... + 21416.

It is an arithmetic number, because the mean of its divisors is an integer number (28168140).

Almost surely, 2^221343233 is an apocalyptic number.

It is an amenable number.

221343233 is a deficient number, since it is larger than the sum of its proper divisors (4001887).

221343233 is a wasteful number, since it uses less digits than its factorization.

221343233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17647.

The product of its digits is 2592, while the sum is 23.

The square root of 221343233 is about 14877.6084435638. The cubic root of 221343233 is about 604.9071942885.

Adding to 221343233 its reverse (332343122), we get a palindrome (553686355).

The spelling of 221343233 in words is "two hundred twenty-one million, three hundred forty-three thousand, two hundred thirty-three".