133912155 has 16 divisors (see below), whose sum is σ = 230741280. Its totient is φ = 65925888.

The previous prime is 133912153. The next prime is 133912199. The reversal of 133912155 is 551219331.

It is not a de Polignac number, because 133912155 - 2¹ = 133912153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133912151) 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 15 ways as a sum of consecutive naturals, for example, 343170 + ... + 343559.

It is an arithmetic number, because the mean of its divisors is an integer number (14421330).

Almost surely, 2^133912155 is an apocalyptic number.

133912155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133912155 is a deficient number, since it is larger than the sum of its proper divisors (96829125).

133912155 is a wasteful number, since it uses less digits than its factorization.

133912155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686750.

The product of its digits is 4050, while the sum is 30.

The square root of 133912155 is about 11572.0419546422. The cubic root of 133912155 is about 511.6111485892.

The spelling of 133912155 in words is "one hundred thirty-three million, nine hundred twelve thousand, one hundred fifty-five".