33221033444440 has 64 divisors (see below), whose sum is σ = 75482874099360. Its totient is φ = 13158279336960.

The previous prime is 33221033444437. The next prime is 33221033444449. The reversal of 33221033444440 is 4444433012233.

It is a super-2 number, since 2×33221033444440² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33221033444440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221033444449) 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, 8159734 + ... + 11533573.

Almost surely, 2^{33221033444440} is an apocalyptic number.

It is an amenable number.

33221033444440 is an abundant number, since it is smaller than the sum of its proper divisors (42261840654920).

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

33221033444440 is a wasteful number, since it uses less digits than its factorization.

33221033444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19693732 (or 19693728 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 33221033444440 its reverse (4444433012233), we get a palindrome (37665466456673).

The spelling of 33221033444440 in words is "thirty-three trillion, two hundred twenty-one billion, thirty-three million, four hundred forty-four thousand, four hundred forty".