31203103223 has 4 divisors (see below), whose sum is σ = 31427586120. Its totient is φ = 30978620328.

The previous prime is 31203103207. The next prime is 31203103247. The reversal of 31203103223 is 32230130213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32230130213 = 2459 ⋅13107007.

It is a cyclic number.

It is not a de Polignac number, because 31203103223 - 2⁴ = 31203103207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31203103195 and 31203103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203103273) 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, 112241240 + ... + 112241517.

It is an arithmetic number, because the mean of its divisors is an integer number (7856896530).

Almost surely, 2^31203103223 is an apocalyptic number.

31203103223 is a deficient number, since it is larger than the sum of its proper divisors (224482897).

31203103223 is a wasteful number, since it uses less digits than its factorization.

31203103223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224482896.

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

Adding to 31203103223 its reverse (32230130213), we get a palindrome (63433233436).

The spelling of 31203103223 in words is "thirty-one billion, two hundred three million, one hundred three thousand, two hundred twenty-three".