231203421 has 12 divisors (see below), whose sum is σ = 334325472. Its totient is φ = 153967176.

The previous prime is 231203407. The next prime is 231203471. The reversal of 231203421 is 124302132.

It is a de Polignac number, because none of the positive numbers 2^k-231203421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231203394 and 231203403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231203471) 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 11 ways as a sum of consecutive naturals, for example, 5041 + ... + 22086.

It is an arithmetic number, because the mean of its divisors is an integer number (27860456).

Almost surely, 2^231203421 is an apocalyptic number.

It is an amenable number.

231203421 is a deficient number, since it is larger than the sum of its proper divisors (103122051).

231203421 is a wasteful number, since it uses less digits than its factorization.

231203421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28080 (or 28077 counting only the distinct ones).

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

The square root of 231203421 is about 15205.3747405317. The cubic root of 231203421 is about 613.7592992094.

Adding to 231203421 its reverse (124302132), we get a palindrome (355505553).

The spelling of 231203421 in words is "two hundred thirty-one million, two hundred three thousand, four hundred twenty-one".