203131031223 has 4 divisors (see below), whose sum is σ = 270841374968. Its totient is φ = 135420687480.

The previous prime is 203131031221. The next prime is 203131031237. The reversal of 203131031223 is 322130131302.

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

It is not a de Polignac number, because 203131031223 - 2¹ = 203131031221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203131031223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203131031221) 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, 33855171868 + ... + 33855171873.

It is an arithmetic number, because the mean of its divisors is an integer number (67710343742).

Almost surely, 2^203131031223 is an apocalyptic number.

203131031223 is a deficient number, since it is larger than the sum of its proper divisors (67710343745).

203131031223 is an equidigital number, since it uses as much as digits as its factorization.

203131031223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67710343744.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 203131031223 its reverse (322130131302), we get a palindrome (525261162525).

The spelling of 203131031223 in words is "two hundred three billion, one hundred thirty-one million, thirty-one thousand, two hundred twenty-three".