31130220033 has 12 divisors (see below), whose sum is σ = 49053680208. Its totient is φ = 18866799960.

The previous prime is 31130219959. The next prime is 31130220047. The reversal of 31130220033 is 33002203113.

31130220033 is a `hidden beast` number, since 311 + 302 + 20 + 0 + 33 = 666.

It is not a de Polignac number, because 31130220033 - 2¹³ = 31130211841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31130219988 and 31130220015.

It is not an unprimeable number, because it can be changed into a prime (31130220053) 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 11 ways as a sum of consecutive naturals, for example, 157223235 + ... + 157223432.

It is an arithmetic number, because the mean of its divisors is an integer number (4087806684).

Almost surely, 2^31130220033 is an apocalyptic number.

31130220033 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31130220033 is a deficient number, since it is larger than the sum of its proper divisors (17923460175).

31130220033 is a wasteful number, since it uses less digits than its factorization.

31130220033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314446684 (or 314446681 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31130220033 its reverse (33002203113), we get a palindrome (64132423146).

The spelling of 31130220033 in words is "thirty-one billion, one hundred thirty million, two hundred twenty thousand, thirty-three".