421431203 has 4 divisors (see below), whose sum is σ = 421719168. Its totient is φ = 421143240.

The previous prime is 421431151. The next prime is 421431209. The reversal of 421431203 is 302134124.

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 421431203 - 2¹⁰ = 421430179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421431209) 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, 141776 + ... + 144717.

It is an arithmetic number, because the mean of its divisors is an integer number (105429792).

Almost surely, 2^421431203 is an apocalyptic number.

421431203 is a deficient number, since it is larger than the sum of its proper divisors (287965).

421431203 is a wasteful number, since it uses less digits than its factorization.

421431203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287964.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421431203 is about 20528.7896136134. The cubic root of 421431203 is about 749.7369169124.

Adding to 421431203 its reverse (302134124), we get a palindrome (723565327).

The spelling of 421431203 in words is "four hundred twenty-one million, four hundred thirty-one thousand, two hundred three".