31320313020233 has 4 divisors (see below), whose sum is σ = 31320485158788. Its totient is φ = 31320140881680.

The previous prime is 31320313020187. The next prime is 31320313020259. The reversal of 31320313020233 is 33202031302313.

It is a happy number.

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 16557835233424 + 14762477786809 = 4069132^2 + 3842197^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320313020233 - 2²² = 31320308825929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31320313050233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85796066 + ... + 86160347.

It is an arithmetic number, because the mean of its divisors is an integer number (7830121289697).

Almost surely, 2^{31320313020233} is an apocalyptic number.

It is an amenable number.

31320313020233 is a deficient number, since it is larger than the sum of its proper divisors (172138555).

31320313020233 is a wasteful number, since it uses less digits than its factorization.

31320313020233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172138554.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 31320313020233 its reverse (33202031302313), we get a palindrome (64522344322546).

The spelling of 31320313020233 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirteen million, twenty thousand, two hundred thirty-three".