231440203 has 16 divisors (see below), whose sum is σ = 246177792. Its totient is φ = 217224000.

The previous prime is 231440201. The next prime is 231440207. The reversal of 231440203 is 302044132.

It is a cyclic number.

It is not a de Polignac number, because 231440203 - 2¹ = 231440201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231440201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267750 + ... + 268612.

It is an arithmetic number, because the mean of its divisors is an integer number (15386112).

Almost surely, 2^231440203 is an apocalyptic number.

231440203 is a deficient number, since it is larger than the sum of its proper divisors (14737589).

231440203 is a wasteful number, since it uses less digits than its factorization.

231440203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 231440203 is about 15213.1588764464. The cubic root of 231440203 is about 613.9687505095.

Adding to 231440203 its reverse (302044132), we get a palindrome (533484335).

The spelling of 231440203 in words is "two hundred thirty-one million, four hundred forty thousand, two hundred three".