33031312220 has 48 divisors (see below), whose sum is σ = 70432809888. Its totient is φ = 13009455360.

The previous prime is 33031312213. The next prime is 33031312229. The reversal of 33031312220 is 2221313033.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33031312192 and 33031312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33031312229) 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 15 ways as a sum of consecutive naturals, for example, 4097714 + ... + 4105766.

It is an arithmetic number, because the mean of its divisors is an integer number (1467350206).

Almost surely, 2^33031312220 is an apocalyptic number.

It is an amenable number.

33031312220 is an abundant number, since it is smaller than the sum of its proper divisors (37401497668).

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

33031312220 is a wasteful number, since it uses less digits than its factorization.

33031312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11190 (or 11188 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 33031312220 its reverse (2221313033), we get a palindrome (35252625253).

The spelling of 33031312220 in words is "thirty-three billion, thirty-one million, three hundred twelve thousand, two hundred twenty".