31223231133 has 4 divisors (see below), whose sum is σ = 41630974848. Its totient is φ = 20815487420.

The previous prime is 31223231063. The next prime is 31223231153. The reversal of 31223231133 is 33113232213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31223231133 - 2²⁵ = 31189676701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223231153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5203871853 + ... + 5203871858.

It is an arithmetic number, because the mean of its divisors is an integer number (10407743712).

Almost surely, 2^31223231133 is an apocalyptic number.

It is an amenable number.

31223231133 is a deficient number, since it is larger than the sum of its proper divisors (10407743715).

31223231133 is a wasteful number, since it uses less digits than its factorization.

31223231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407743714.

The product of its digits is 1944, while the sum is 24.

Adding to 31223231133 its reverse (33113232213), we get a palindrome (64336463346).

The spelling of 31223231133 in words is "thirty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-three".