33131304220 has 48 divisors (see below), whose sum is σ = 80473171968. Its totient is φ = 11222441280.

The previous prime is 33131304139. The next prime is 33131304223. The reversal of 33131304220 is 2240313133.

It is a junction number, because it is equal to n+sod(n) for n = 33131304191 and 33131304200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33131304223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413996 + ... + 1437235.

It is an arithmetic number, because the mean of its divisors is an integer number (1676524416).

Almost surely, 2^33131304220 is an apocalyptic number.

It is an amenable number.

33131304220 is an abundant number, since it is smaller than the sum of its proper divisors (47341867748).

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

33131304220 is a wasteful number, since it uses less digits than its factorization.

33131304220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851330 (or 2851328 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33131304220 its reverse (2240313133), we get a palindrome (35371617353).

The spelling of 33131304220 in words is "thirty-three billion, one hundred thirty-one million, three hundred four thousand, two hundred twenty".