31313243433 has 8 divisors (see below), whose sum is σ = 41752000000. Its totient is φ = 20874991248.

The previous prime is 31313243431. The next prime is 31313243473. The reversal of 31313243433 is 33434231313.

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

It is not a de Polignac number, because 31313243433 - 2¹ = 31313243431 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 31313243433.

It is not an unprimeable number, because it can be changed into a prime (31313243431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56568 + ... + 256566.

It is an arithmetic number, because the mean of its divisors is an integer number (5219000000).

Almost surely, 2^31313243433 is an apocalyptic number.

It is an amenable number.

31313243433 is a deficient number, since it is larger than the sum of its proper divisors (10438756567).

31313243433 is a wasteful number, since it uses less digits than its factorization.

31313243433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252191.

The product of its digits is 23328, while the sum is 30.

Adding to 31313243433 its reverse (33434231313), we get a palindrome (64747474746).

The spelling of 31313243433 in words is "thirty-one billion, three hundred thirteen million, two hundred forty-three thousand, four hundred thirty-three".