31133320033 has 4 divisors (see below), whose sum is σ = 31305327508. Its totient is φ = 30961312560.

The previous prime is 31133320013. The next prime is 31133320079. The reversal of 31133320033 is 33002333113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33002333113 = 37 ⋅891954949.

It can be written as a sum of positive squares in 2 ways, for example, as 15393861184 + 15739458849 = 124072^2 + 125457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31133320033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31133319986 and 31133320013.

It is not an unprimeable number, because it can be changed into a prime (31133320013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86003466 + ... + 86003827.

It is an arithmetic number, because the mean of its divisors is an integer number (7826331877).

Almost surely, 2^31133320033 is an apocalyptic number.

It is an amenable number.

31133320033 is a deficient number, since it is larger than the sum of its proper divisors (172007475).

31133320033 is a wasteful number, since it uses less digits than its factorization.

31133320033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172007474.

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 31133320033 its reverse (33002333113), we get a palindrome (64135653146).

The spelling of 31133320033 in words is "thirty-one billion, one hundred thirty-three million, three hundred twenty thousand, thirty-three".