231001323203 has 4 divisors (see below), whose sum is σ = 264001512240. Its totient is φ = 198001134168.

The previous prime is 231001323191. The next prime is 231001323251. The reversal of 231001323203 is 302323100132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231001323203 - 2⁶ = 231001323139 is a prime.

It is a super-2 number, since 2×231001323203² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231001323263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16500094508 + ... + 16500094521.

It is an arithmetic number, because the mean of its divisors is an integer number (66000378060).

Almost surely, 2^231001323203 is an apocalyptic number.

231001323203 is a deficient number, since it is larger than the sum of its proper divisors (33000189037).

231001323203 is an equidigital number, since it uses as much as digits as its factorization.

231001323203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33000189036.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 231001323203 its reverse (302323100132), we get a palindrome (533324423335).

The spelling of 231001323203 in words is "two hundred thirty-one billion, one million, three hundred twenty-three thousand, two hundred three".