33521472 has 112 divisors (see below), whose sum is σ = 103835200. Its totient is φ = 10575360.

The previous prime is 33521471. The next prime is 33521483. The reversal of 33521472 is 27412533.

It is a super-2 number, since 2×33521472² = 2247378170093568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33521471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32322 + ... + 33342.

It is an arithmetic number, because the mean of its divisors is an integer number (927100).

Almost surely, 2^33521472 is an apocalyptic number.

33521472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33521472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51917600).

33521472 is an abundant number, since it is smaller than the sum of its proper divisors (70313728).

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

33521472 is a wasteful number, since it uses less digits than its factorization.

33521472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061 (or 1045 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 33521472 is about 5789.7730525471. The cubic root of 33521472 is about 322.4341455583.

The spelling of 33521472 in words is "thirty-three million, five hundred twenty-one thousand, four hundred seventy-two".