231421203 has 24 divisors (see below), whose sum is σ = 361320960. Its totient is φ = 141886080.

The previous prime is 231421171. The next prime is 231421207. The reversal of 231421203 is 302124132.

It is not a de Polignac number, because 231421203 - 2⁵ = 231421171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231421207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29358 + ... + 36396.

It is an arithmetic number, because the mean of its divisors is an integer number (15055040).

Almost surely, 2^231421203 is an apocalyptic number.

231421203 is a deficient number, since it is larger than the sum of its proper divisors (129899757).

231421203 is a wasteful number, since it uses less digits than its factorization.

231421203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7339 (or 7336 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231421203 is about 15212.5344042339. The cubic root of 231421203 is about 613.9519488687.

Adding to 231421203 its reverse (302124132), we get a palindrome (533545335).

The spelling of 231421203 in words is "two hundred thirty-one million, four hundred twenty-one thousand, two hundred three".