31031300133 has 6 divisors (see below), whose sum is σ = 44822989094. Its totient is φ = 20687533416.

The previous prime is 31031300089. The next prime is 31031300161. The reversal of 31031300133 is 33100313013.

It can be written as a sum of positive squares in only one way, i.e., 25562253924 + 5469046209 = 159882^2 + 73953^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31031300133 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 (31031300233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1723961110 + ... + 1723961127.

Almost surely, 2^31031300133 is an apocalyptic number.

It is an amenable number.

31031300133 is a deficient number, since it is larger than the sum of its proper divisors (13791688961).

31031300133 is a wasteful number, since it uses less digits than its factorization.

31031300133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447922243 (or 3447922240 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 18.

Adding to 31031300133 its reverse (33100313013), we get a palindrome (64131613146).

The spelling of 31031300133 in words is "thirty-one billion, thirty-one million, three hundred thousand, one hundred thirty-three".