31321321133 has 8 divisors (see below), whose sum is σ = 32691576768. Its totient is φ = 29951770464.

The previous prime is 31321321123. The next prime is 31321321139. The reversal of 31321321133 is 33112312313.

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 31321321133 - 2⁴ = 31321321117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31321321099 and 31321321108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321321139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84416 + ... + 264137.

It is an arithmetic number, because the mean of its divisors is an integer number (4086447096).

Almost surely, 2^31321321133 is an apocalyptic number.

It is an amenable number.

31321321133 is a deficient number, since it is larger than the sum of its proper divisors (1370255635).

31321321133 is a wasteful number, since it uses less digits than its factorization.

31321321133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352483.

The product of its digits is 972, while the sum is 23.

Adding to 31321321133 its reverse (33112312313), we get a palindrome (64433633446).

The spelling of 31321321133 in words is "thirty-one billion, three hundred twenty-one million, three hundred twenty-one thousand, one hundred thirty-three".