231403203 has 8 divisors (see below), whose sum is σ = 342819600. Its totient is φ = 154268784.

The previous prime is 231403187. The next prime is 231403213. The reversal of 231403203 is 302304132.

It is not a de Polignac number, because 231403203 - 2⁴ = 231403187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231403213) 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 7 ways as a sum of consecutive naturals, for example, 4285218 + ... + 4285271.

It is an arithmetic number, because the mean of its divisors is an integer number (42852450).

Almost surely, 2^231403203 is an apocalyptic number.

231403203 is a deficient number, since it is larger than the sum of its proper divisors (111416397).

231403203 is an equidigital number, since it uses as much as digits as its factorization.

231403203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570498 (or 8570492 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231403203 is about 15211.9427753328. The cubic root of 231403203 is about 613.9360306764.

Adding to 231403203 its reverse (302304132), we get a palindrome (533707335).

The spelling of 231403203 in words is "two hundred thirty-one million, four hundred three thousand, two hundred three".