33135140 has 24 divisors (see below), whose sum is σ = 70120512. Its totient is φ = 13151840.

The previous prime is 33135133. The next prime is 33135143. The reversal of 33135140 is 4153133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (33135143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3704 + ... + 8943.

It is an arithmetic number, because the mean of its divisors is an integer number (2921688).

Almost surely, 2^33135140 is an apocalyptic number.

It is an amenable number.

33135140 is an abundant number, since it is smaller than the sum of its proper divisors (36985372).

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

33135140 is a wasteful number, since it uses less digits than its factorization.

33135140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12787 (or 12785 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 33135140 is about 5756.3130561150. The cubic root of 33135140 is about 321.1906813113.

Adding to 33135140 its reverse (4153133), we get a palindrome (37288273).

The spelling of 33135140 in words is "thirty-three million, one hundred thirty-five thousand, one hundred forty".