31320323233 has 4 divisors (see below), whose sum is σ = 31321109268. Its totient is φ = 31319537200.

The previous prime is 31320323231. The next prime is 31320323291. The reversal of 31320323233 is 33232302313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33232302313 = 7 ⋅4747471759.

It can be written as a sum of positive squares in 2 ways, for example, as 25029771264 + 6290551969 = 158208^2 + 79313^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320323233 - 2¹ = 31320323231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31320323198 and 31320323207.

It is not an unprimeable number, because it can be changed into a prime (31320323231) 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 3 ways as a sum of consecutive naturals, for example, 329866 + ... + 414067.

It is an arithmetic number, because the mean of its divisors is an integer number (7830277317).

Almost surely, 2^31320323233 is an apocalyptic number.

It is an amenable number.

31320323233 is a deficient number, since it is larger than the sum of its proper divisors (786035).

31320323233 is an equidigital number, since it uses as much as digits as its factorization.

31320323233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786034.

The product of its (nonzero) digits is 5832, while the sum is 25.

Adding to 31320323233 its reverse (33232302313), we get a palindrome (64552625546).

The spelling of 31320323233 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, two hundred thirty-three".