203313023231 has 4 divisors (see below), whose sum is σ = 203357197512. Its totient is φ = 203268848952.

The previous prime is 203313023171. The next prime is 203313023233. The reversal of 203313023231 is 132320313302.

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 203313023231 - 2⁶ = 203313023167 is a prime.

It is a super-2 number, since 2×203313023231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203313023197 and 203313023206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203313023233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22080236 + ... + 22089441.

It is an arithmetic number, because the mean of its divisors is an integer number (50839299378).

Almost surely, 2^203313023231 is an apocalyptic number.

203313023231 is a deficient number, since it is larger than the sum of its proper divisors (44174281).

203313023231 is an equidigital number, since it uses as much as digits as its factorization.

203313023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44174280.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 203313023231 its reverse (132320313302), we get a palindrome (335633336533).

The spelling of 203313023231 in words is "two hundred three billion, three hundred thirteen million, twenty-three thousand, two hundred thirty-one".