133020240 has 80 divisors (see below), whose sum is σ = 436632768. Its totient is φ = 33384448.

The previous prime is 133020229. The next prime is 133020241. The reversal of 133020240 is 42020331.

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

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133020241) 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, 12222 + ... + 20381.

Almost surely, 2^133020240 is an apocalyptic number.

133020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133020240 is an abundant number, since it is smaller than the sum of its proper divisors (303612528).

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

133020240 is a wasteful number, since it uses less digits than its factorization.

133020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32636 (or 32630 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 133020240 is about 11533.4400765773. The cubic root of 133020240 is about 510.4727642319.

Adding to 133020240 its reverse (42020331), we get a palindrome (175040571).

Subtracting from 133020240 its reverse (42020331), we obtain a palindrome (90999909).

The spelling of 133020240 in words is "one hundred thirty-three million, twenty thousand, two hundred forty".