33131344312 has 128 divisors (see below), whose sum is σ = 70935549120. Its totient is φ = 14376960000.

The previous prime is 33131344273. The next prime is 33131344327. The reversal of 33131344312 is 21344313133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28734328 + ... + 28735480.

Almost surely, 2^33131344312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33131344312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35467774560).

33131344312 is an abundant number, since it is smaller than the sum of its proper divisors (37804204808).

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

33131344312 is a wasteful number, since it uses less digits than its factorization.

33131344312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1381 counting only the distinct ones).

The product of its digits is 7776, while the sum is 28.

Adding to 33131344312 its reverse (21344313133), we get a palindrome (54475657445).

The spelling of 33131344312 in words is "thirty-three billion, one hundred thirty-one million, three hundred forty-four thousand, three hundred twelve".