31313133320033 has 4 divisors (see below), whose sum is σ = 31313145742788. Its totient is φ = 31313120897280.

The previous prime is 31313133320023. The next prime is 31313133320041. The reversal of 31313133320033 is 33002333131313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26116269926464 + 5196863393569 = 5110408^2 + 2279663^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313133320033 - 2¹⁰ = 31313133319009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313133319978 and 31313133320005.

It is not an unprimeable number, because it can be changed into a prime (31313133320023) 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, 938216 + ... + 7969097.

It is an arithmetic number, because the mean of its divisors is an integer number (7828286435697).

Almost surely, 2^{31313133320033} is an apocalyptic number.

It is an amenable number.

31313133320033 is a deficient number, since it is larger than the sum of its proper divisors (12422755).

31313133320033 is an equidigital number, since it uses as much as digits as its factorization.

31313133320033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12422754.

The product of its (nonzero) digits is 13122, while the sum is 29.

Adding to 31313133320033 its reverse (33002333131313), we get a palindrome (64315466451346).

The spelling of 31313133320033 in words is "thirty-one trillion, three hundred thirteen billion, one hundred thirty-three million, three hundred twenty thousand, thirty-three".