231128203 has 2 divisors, whose sum is σ = 231128204. Its totient is φ = 231128202.

The previous prime is 231128197. The next prime is 231128213. The reversal of 231128203 is 302821132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231128203 - 2⁵ = 231128171 is a prime.

It is not a weakly prime, because it can be changed into another prime (231128213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115564101 + 115564102.

It is an arithmetic number, because the mean of its divisors is an integer number (115564102).

Almost surely, 2^231128203 is an apocalyptic number.

231128203 is a deficient number, since it is larger than the sum of its proper divisors (1).

231128203 is an equidigital number, since it uses as much as digits as its factorization.

231128203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 231128203 is about 15202.9011376119. The cubic root of 231128203 is about 613.6927333629.

Adding to 231128203 its reverse (302821132), we get a palindrome (533949335).

The spelling of 231128203 in words is "two hundred thirty-one million, one hundred twenty-eight thousand, two hundred three".