31323330331133 has 4 divisors (see below), whose sum is σ = 32087313997788. Its totient is φ = 30559346664480.

The previous prime is 31323330331129. The next prime is 31323330331213. The reversal of 31323330331133 is 33113303332313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2602327127929 + 28721003203204 = 1613173^2 + 5359198^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323330331133 - 2² = 31323330331129 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 31323330331133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323330331333) 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, 381991833266 + ... + 381991833347.

It is an arithmetic number, because the mean of its divisors is an integer number (8021828499447).

Almost surely, 2^{31323330331133} is an apocalyptic number.

It is an amenable number.

31323330331133 is a deficient number, since it is larger than the sum of its proper divisors (763983666655).

31323330331133 is an equidigital number, since it uses as much as digits as its factorization.

31323330331133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763983666654.

The product of its (nonzero) digits is 39366, while the sum is 32.

Adding to 31323330331133 its reverse (33113303332313), we get a palindrome (64436633663446).

The spelling of 31323330331133 in words is "thirty-one trillion, three hundred twenty-three billion, three hundred thirty million, three hundred thirty-one thousand, one hundred thirty-three".