433221421 has 8 divisors (see below), whose sum is σ = 463248504. Its totient is φ = 403699200.

The previous prime is 433221407. The next prime is 433221449. The reversal of 433221421 is 124122334.

It can be written as a sum of positive squares in 4 ways, for example, as 139476100 + 293745321 = 11810^2 + 17139^2 .

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 433221421 - 2¹¹ = 433219373 is a prime.

It is a super-2 number, since 2×433221421² = 375361599226518482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 433221392 and 433221401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (433221461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124440 + ... + 127873.

It is an arithmetic number, because the mean of its divisors is an integer number (57906063).

Almost surely, 2^433221421 is an apocalyptic number.

It is an amenable number.

433221421 is a deficient number, since it is larger than the sum of its proper divisors (30027083).

433221421 is a wasteful number, since it uses less digits than its factorization.

433221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252431.

The product of its digits is 1152, while the sum is 22.

The square root of 433221421 is about 20813.9717737870. The cubic root of 433221421 is about 756.6644104763.

Adding to 433221421 its reverse (124122334), we get a palindrome (557343755).

The spelling of 433221421 in words is "four hundred thirty-three million, two hundred twenty-one thousand, four hundred twenty-one".