221040326 has 8 divisors (see below), whose sum is σ = 357065184. Its totient is φ = 102018600.

The previous prime is 221040301. The next prime is 221040353. The reversal of 221040326 is 623040122.

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

It is a junction number, because it is equal to n+sod(n) for n = 221040298 and 221040307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250750 + ... + 4250801.

It is an arithmetic number, because the mean of its divisors is an integer number (44633148).

Almost surely, 2^221040326 is an apocalyptic number.

221040326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

221040326 is a deficient number, since it is larger than the sum of its proper divisors (136024858).

221040326 is a wasteful number, since it uses less digits than its factorization.

221040326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8501566.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 221040326 is about 14867.4249956070. The cubic root of 221040326 is about 604.6311309276.

Adding to 221040326 its reverse (623040122), we get a palindrome (844080448).

The spelling of 221040326 in words is "two hundred twenty-one million, forty thousand, three hundred twenty-six".