433213221 has 8 divisors (see below), whose sum is σ = 660134464. Its totient is φ = 247550400.

The previous prime is 433213219. The next prime is 433213229. The reversal of 433213221 is 122312334.

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

It is not a de Polignac number, because 433213221 - 2¹ = 433213219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 20629201 = 433213221 / (4 + 3 + 3 + 2 + 1 + 3 + 2 + 2 + 1).

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 (433213229) 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, 10314580 + ... + 10314621.

It is an arithmetic number, because the mean of its divisors is an integer number (82516808).

Almost surely, 2^433213221 is an apocalyptic number.

It is an amenable number.

433213221 is a deficient number, since it is larger than the sum of its proper divisors (226921243).

433213221 is a wasteful number, since it uses less digits than its factorization.

433213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20629211.

The product of its digits is 864, while the sum is 21.

The square root of 433213221 is about 20813.7747897877. The cubic root of 433213221 is about 756.6596364069.

Adding to 433213221 its reverse (122312334), we get a palindrome (555525555).

The spelling of 433213221 in words is "four hundred thirty-three million, two hundred thirteen thousand, two hundred twenty-one".