133332240 has 80 divisors (see below), whose sum is σ = 426686976. Its totient is φ = 34406400.

The previous prime is 133332239. The next prime is 133332247. The reversal of 133332240 is 42233331.

133332240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (133332247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1521 + ... + 16400.

Almost surely, 2^133332240 is an apocalyptic number.

133332240 is a gapful number since it is divisible by the number (10) 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 133332240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213343488).

133332240 is an abundant number, since it is smaller than the sum of its proper divisors (293354736).

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

133332240 is a wasteful number, since it uses less digits than its factorization.

133332240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17968 (or 17962 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 133332240 is about 11546.9580409734. The cubic root of 133332240 is about 510.8715585391.

Adding to 133332240 its reverse (42233331), we get a palindrome (175565571).

The spelling of 133332240 in words is "one hundred thirty-three million, three hundred thirty-two thousand, two hundred forty".