31303323133 has 12 divisors (see below), whose sum is σ = 33476231700. Its totient is φ = 29264179712.

The previous prime is 31303323113. The next prime is 31303323143. The reversal of 31303323133 is 33132330313.

It can be written as a sum of positive squares in 6 ways, for example, as 176836804 + 31126486329 = 13298^2 + 176427^2 .

It is not a de Polignac number, because 31303323133 - 2²¹ = 31301225981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31303323098 and 31303323107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31303323113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320416 + ... + 406537.

It is an arithmetic number, because the mean of its divisors is an integer number (2789685975).

Almost surely, 2^31303323133 is an apocalyptic number.

It is an amenable number.

31303323133 is a deficient number, since it is larger than the sum of its proper divisors (2172908567).

31303323133 is a wasteful number, since it uses less digits than its factorization.

31303323133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727136 (or 727119 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 25.

Adding to 31303323133 its reverse (33132330313), we get a palindrome (64435653446).

The spelling of 31303323133 in words is "thirty-one billion, three hundred three million, three hundred twenty-three thousand, one hundred thirty-three".