421903219 has 4 divisors (see below), whose sum is σ = 421956280. Its totient is φ = 421850160.

The previous prime is 421903171. The next prime is 421903291. The reversal of 421903219 is 912309124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421903219 - 2⁹ = 421902707 is a prime.

It is a super-2 number, since 2×421903219² = 356004652405123922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421903019) 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 3 ways as a sum of consecutive naturals, for example, 11922 + ... + 31399.

It is an arithmetic number, because the mean of its divisors is an integer number (105489070).

Almost surely, 2^421903219 is an apocalyptic number.

421903219 is a deficient number, since it is larger than the sum of its proper divisors (53061).

421903219 is an equidigital number, since it uses as much as digits as its factorization.

421903219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53060.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 421903219 is about 20540.2828364168. The cubic root of 421903219 is about 750.0167219975.

The spelling of 421903219 in words is "four hundred twenty-one million, nine hundred three thousand, two hundred nineteen".