33105221440 has 56 divisors (see below), whose sum is σ = 81550169640. Its totient is φ = 12785461248.

The previous prime is 33105221339. The next prime is 33105221447. The reversal of 33105221440 is 4412250133.

It can be written as a sum of positive squares in 4 ways, for example, as 2022121024 + 31083100416 = 44968^2 + 176304^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33105221447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1774407 + ... + 1792966.

Almost surely, 2^33105221440 is an apocalyptic number.

It is an amenable number.

33105221440 is an abundant number, since it is smaller than the sum of its proper divisors (48444948200).

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

33105221440 is a wasteful number, since it uses less digits than its factorization.

33105221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567419 (or 3567409 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 33105221440 its reverse (4412250133), we get a palindrome (37517471573).

The spelling of 33105221440 in words is "thirty-three billion, one hundred five million, two hundred twenty-one thousand, four hundred forty".