421033220 has 24 divisors (see below), whose sum is σ = 936180504. Its totient is φ = 158506496.

The previous prime is 421033213. The next prime is 421033229. The reversal of 421033220 is 22330124.

It can be written as a sum of positive squares in 4 ways, for example, as 68194564 + 352838656 = 8258^2 + 18784^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (421033229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618827 + ... + 619506.

It is an arithmetic number, because the mean of its divisors is an integer number (39007521).

Almost surely, 2^421033220 is an apocalyptic number.

It is an amenable number.

421033220 is an abundant number, since it is smaller than the sum of its proper divisors (515147284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421033220 is a wasteful number, since it uses less digits than its factorization.

421033220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238359 (or 1238357 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 421033220 is about 20519.0940345815. The cubic root of 421033220 is about 749.5008352605.

Adding to 421033220 its reverse (22330124), we get a palindrome (443363344).

The spelling of 421033220 in words is "four hundred twenty-one million, thirty-three thousand, two hundred twenty".