133540655 has 8 divisors (see below), whose sum is σ = 163272672. Its totient is φ = 104816608.

The previous prime is 133540637. The next prime is 133540681. The reversal of 133540655 is 556045331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133540655 - 2¹⁰ = 133539631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 251699 + ... + 252228.

It is an arithmetic number, because the mean of its divisors is an integer number (20409084).

Almost surely, 2^133540655 is an apocalyptic number.

133540655 is a deficient number, since it is larger than the sum of its proper divisors (29732017).

133540655 is an equidigital number, since it uses as much as digits as its factorization.

133540655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503985.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 133540655 is about 11555.9791882817. The cubic root of 133540655 is about 511.1376053881.

Adding to 133540655 its reverse (556045331), we get a palindrome (689585986).

The spelling of 133540655 in words is "one hundred thirty-three million, five hundred forty thousand, six hundred fifty-five".