133340555 has 4 divisors (see below), whose sum is σ = 160008672. Its totient is φ = 106672440.

The previous prime is 133340539. The next prime is 133340561. The reversal of 133340555 is 555043331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133340555 - 2⁴ = 133340539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13334051 + ... + 13334060.

It is an arithmetic number, because the mean of its divisors is an integer number (40002168).

Almost surely, 2^133340555 is an apocalyptic number.

133340555 is a deficient number, since it is larger than the sum of its proper divisors (26668117).

133340555 is an equidigital number, since it uses as much as digits as its factorization.

133340555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26668116.

The product of its (nonzero) digits is 13500, while the sum is 29.

The square root of 133340555 is about 11547.3180868979. The cubic root of 133340555 is about 510.8821781480.

Adding to 133340555 its reverse (555043331), we get a palindrome (688383886).

The spelling of 133340555 in words is "one hundred thirty-three million, three hundred forty thousand, five hundred fifty-five".