33131313220 has 24 divisors (see below), whose sum is σ = 69652505664. Its totient is φ = 13237906656.

The previous prime is 33131313197. The next prime is 33131313221. The reversal of 33131313220 is 2231313133.

It is a junction number, because it is equal to n+sod(n) for n = 33131313191 and 33131313200.

It is not an unprimeable number, because it can be changed into a prime (33131313221) 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 7 ways as a sum of consecutive naturals, for example, 895072 + ... + 931351.

It is an arithmetic number, because the mean of its divisors is an integer number (2902187736).

Almost surely, 2^33131313220 is an apocalyptic number.

It is an amenable number.

33131313220 is an abundant number, since it is smaller than the sum of its proper divisors (36521192444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33131313220 is a wasteful number, since it uses less digits than its factorization.

33131313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827339 (or 1827337 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 33131313220 its reverse (2231313133), we get a palindrome (35362626353).

The spelling of 33131313220 in words is "thirty-three billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred twenty".