31313442133 has 8 divisors (see below), whose sum is σ = 31468098528. Its totient is φ = 31158932784.

The previous prime is 31313442109. The next prime is 31313442163. The reversal of 31313442133 is 33124431313.

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

It is a cyclic number.

It is not a de Polignac number, because 31313442133 - 2⁵ = 31313442101 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 (31313442163) 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 7 ways as a sum of consecutive naturals, for example, 403110 + ... + 474472.

It is an arithmetic number, because the mean of its divisors is an integer number (3933512316).

Almost surely, 2^31313442133 is an apocalyptic number.

It is an amenable number.

31313442133 is a deficient number, since it is larger than the sum of its proper divisors (154656395).

31313442133 is a wasteful number, since it uses less digits than its factorization.

31313442133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73523.

The product of its digits is 7776, while the sum is 28.

Adding to 31313442133 its reverse (33124431313), we get a palindrome (64437873446).

The spelling of 31313442133 in words is "thirty-one billion, three hundred thirteen million, four hundred forty-two thousand, one hundred thirty-three".