31031310133 has 4 divisors (see below), whose sum is σ = 32101355340. Its totient is φ = 29961264928.

The previous prime is 31031310113. The next prime is 31031310151. The reversal of 31031310133 is 33101313013.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33101313013 = 103 ⋅321371971.

It can be written as a sum of positive squares in 2 ways, for example, as 14130790129 + 16900520004 = 118873^2 + 130002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31031310133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31031310133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031310113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535022560 + ... + 535022617.

It is an arithmetic number, because the mean of its divisors is an integer number (8025338835).

Almost surely, 2^31031310133 is an apocalyptic number.

It is an amenable number.

31031310133 is a deficient number, since it is larger than the sum of its proper divisors (1070045207).

31031310133 is a wasteful number, since it uses less digits than its factorization.

31031310133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070045206.

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31031310133 its reverse (33101313013), we get a palindrome (64132623146).

The spelling of 31031310133 in words is "thirty-one billion, thirty-one million, three hundred ten thousand, one hundred thirty-three".