33521012 has 24 divisors (see below), whose sum is σ = 67400256. Its totient is φ = 14289408.

The previous prime is 33521009. The next prime is 33521021. The reversal of 33521012 is 21012533.

It is a super-2 number, since 2×33521012² = 2247316491008288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2303 + ... + 8505.

It is an arithmetic number, because the mean of its divisors is an integer number (2808344).

Almost surely, 2^33521012 is an apocalyptic number.

It is an amenable number.

33521012 is an abundant number, since it is smaller than the sum of its proper divisors (33879244).

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

33521012 is a wasteful number, since it uses less digits than its factorization.

33521012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6407 (or 6405 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 33521012 is about 5789.7333271922. The cubic root of 33521012 is about 322.4326706789.

Adding to 33521012 its reverse (21012533), we get a palindrome (54533545).

The spelling of 33521012 in words is "thirty-three million, five hundred twenty-one thousand, twelve".