33121340 has 48 divisors (see below), whose sum is σ = 79833600. Its totient is φ = 11307072.

The previous prime is 33121339. The next prime is 33121367. The reversal of 33121340 is 4312133.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49931 + ... + 50589.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^33121340 is an apocalyptic number.

It is an amenable number.

33121340 is an abundant number, since it is smaller than the sum of its proper divisors (46712260).

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

33121340 is a wasteful number, since it uses less digits than its factorization.

33121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 33121340 is about 5755.1142473456. The cubic root of 33121340 is about 321.1460856859.

Adding to 33121340 its reverse (4312133), we get a palindrome (37433473).

The spelling of 33121340 in words is "thirty-three million, one hundred twenty-one thousand, three hundred forty".