31230113133 has 8 divisors (see below), whose sum is σ = 41646613600. Its totient is φ = 20816844048.

The previous prime is 31230113129. The next prime is 31230113149. The reversal of 31230113133 is 33131103213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31230113133 - 2² = 31230113129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230113153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785203 + ... + 824016.

It is an arithmetic number, because the mean of its divisors is an integer number (5205826700).

Almost surely, 2^31230113133 is an apocalyptic number.

It is an amenable number.

31230113133 is a deficient number, since it is larger than the sum of its proper divisors (10416500467).

31230113133 is a wasteful number, since it uses less digits than its factorization.

31230113133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615691.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31230113133 its reverse (33131103213), we get a palindrome (64361216346).

The spelling of 31230113133 in words is "thirty-one billion, two hundred thirty million, one hundred thirteen thousand, one hundred thirty-three".