33442131220 has 12 divisors (see below), whose sum is σ = 70228475604. Its totient is φ = 13376852480.

The previous prime is 33442131193. The next prime is 33442131227. The reversal of 33442131220 is 2213124433.

It can be written as a sum of positive squares in 2 ways, for example, as 3393295504 + 30048835716 = 58252^2 + 173346^2 .

It is a super-2 number, since 2×33442131220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33442131227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836053261 + ... + 836053300.

It is an arithmetic number, because the mean of its divisors is an integer number (5852372967).

Almost surely, 2^33442131220 is an apocalyptic number.

It is an amenable number.

33442131220 is an abundant number, since it is smaller than the sum of its proper divisors (36786344384).

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

33442131220 is a wasteful number, since it uses less digits than its factorization.

33442131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672106570 (or 1672106568 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 33442131220 its reverse (2213124433), we get a palindrome (35655255653).

It can be divided in two parts, 3344213 and 1220, that added together give a palindrome (3345433).

The spelling of 33442131220 in words is "thirty-three billion, four hundred forty-two million, one hundred thirty-one thousand, two hundred twenty".