31313133133 has 16 divisors (see below), whose sum is σ = 32909475456. Its totient is φ = 29737128960.

The previous prime is 31313133083. The next prime is 31313133151. The reversal of 31313133133 is 33133131313.

It is a cyclic number.

It is not a de Polignac number, because 31313133133 - 2⁹ = 31313132621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313133098 and 31313133107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313733133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1859610 + ... + 1876372.

It is an arithmetic number, because the mean of its divisors is an integer number (2056842216).

Almost surely, 2^31313133133 is an apocalyptic number.

It is an amenable number.

31313133133 is a deficient number, since it is larger than the sum of its proper divisors (1596342323).

31313133133 is a wasteful number, since it uses less digits than its factorization.

31313133133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17364.

The product of its digits is 2187, while the sum is 25.

Adding to 31313133133 its reverse (33133131313), we get a palindrome (64446264446).

The spelling of 31313133133 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty-three thousand, one hundred thirty-three".