408221333 has 16 divisors (see below), whose sum is σ = 458939376. Its totient is φ = 360599040.

The previous prime is 408221311. The next prime is 408221339. The reversal of 408221333 is 333122804.

It can be written as a sum of positive squares in 8 ways, for example, as 15507844 + 392713489 = 3938^2 + 19817^2 .

It is not a de Polignac number, because 408221333 - 2⁶ = 408221269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408221339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22385 + ... + 36297.

It is an arithmetic number, because the mean of its divisors is an integer number (28683711).

Almost surely, 2^408221333 is an apocalyptic number.

It is an amenable number.

408221333 is a deficient number, since it is larger than the sum of its proper divisors (50718043).

408221333 is a wasteful number, since it uses less digits than its factorization.

408221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14024.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 408221333 is about 20204.4879420390. The cubic root of 408221333 is about 741.8200469101.

The spelling of 408221333 in words is "four hundred eight million, two hundred twenty-one thousand, three hundred thirty-three".