421820222 has 8 divisors (see below), whose sum is σ = 632971200. Its totient is φ = 210829824.

The previous prime is 421820219. The next prime is 421820227. The reversal of 421820222 is 222028124.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421820227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33347 + ... + 44222.

It is an arithmetic number, because the mean of its divisors is an integer number (79121400).

Almost surely, 2^421820222 is an apocalyptic number.

421820222 is a deficient number, since it is larger than the sum of its proper divisors (211150978).

421820222 is a wasteful number, since it uses less digits than its factorization.

421820222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80290.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 421820222 is about 20538.2623899881. The cubic root of 421820222 is about 749.9675375579.

Adding to 421820222 its reverse (222028124), we get a palindrome (643848346).

The spelling of 421820222 in words is "four hundred twenty-one million, eight hundred twenty thousand, two hundred twenty-two".