33231040 has 56 divisors (see below), whose sum is σ = 79918560. Its totient is φ = 13160448.

The previous prime is 33231017. The next prime is 33231041. The reversal of 33231040 is 4013233.

It is a super-2 number, since 2×33231040² = 2208604038963200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (33231041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35701 + ... + 36619.

Almost surely, 2^33231040 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 33231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39959280).

33231040 is an abundant number, since it is smaller than the sum of its proper divisors (46687520).

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

33231040 is a wasteful number, since it uses less digits than its factorization.

33231040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 33231040 is about 5764.6370223979. The cubic root of 33231040 is about 321.5002471081.

Adding to 33231040 its reverse (4013233), we get a palindrome (37244273).

The spelling of 33231040 in words is "thirty-three million, two hundred thirty-one thousand, forty".