421323231 has 8 divisors (see below), whose sum is σ = 642016384. Its totient is φ = 240756120.

The previous prime is 421323229. The next prime is 421323247. The reversal of 421323231 is 132323124.

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

It is not a de Polignac number, because 421323231 - 2¹ = 421323229 is a prime.

It is a super-2 number, since 2×421323231² = 355026529960558722, which contains 22 as substring.

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: 20063011 = 421323231 / (4 + 2 + 1 + 3 + 2 + 3 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421323198 and 421323207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421323031) 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, 10031485 + ... + 10031526.

It is an arithmetic number, because the mean of its divisors is an integer number (80252048).

Almost surely, 2^421323231 is an apocalyptic number.

421323231 is a deficient number, since it is larger than the sum of its proper divisors (220693153).

421323231 is a wasteful number, since it uses less digits than its factorization.

421323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20063021.

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

The square root of 421323231 is about 20526.1596749124. The cubic root of 421323231 is about 749.6728831246.

Adding to 421323231 its reverse (132323124), we get a palindrome (553646355).

The spelling of 421323231 in words is "four hundred twenty-one million, three hundred twenty-three thousand, two hundred thirty-one".