133013240 has 16 divisors (see below), whose sum is σ = 299279880. Its totient is φ = 53205280.

The previous prime is 133013213. The next prime is 133013249. The reversal of 133013240 is 42310331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133013249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662626 + ... + 1662705.

Almost surely, 2^133013240 is an apocalyptic number.

133013240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133013240 is an abundant number, since it is smaller than the sum of its proper divisors (166266640).

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

133013240 is a wasteful number, since it uses less digits than its factorization.

133013240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325342 (or 3325338 counting only the distinct ones).

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

The square root of 133013240 is about 11533.1366071854. The cubic root of 133013240 is about 510.4638097749.

Adding to 133013240 its reverse (42310331), we get a palindrome (175323571).

The spelling of 133013240 in words is "one hundred thirty-three million, thirteen thousand, two hundred forty".